Examsbook | Hand picked material and question banks

प्र: If a 36 cm thread is used to wrap a book, lengthwise twice and breadth wise once, what is the size of the book ? 1219 0

उत्तर : 1. "288 sq.cm"
व्याख्या :
Answer: A) 288 sq.cm Explanation: Length of the thread is 36 cms. length wise twice breath wise once then totally thrice.so 36/3 = 12.so length is 12 x 2 = 24 cmsbreath is 12 cmsArea of the book = length x breath = 24 x 12 = 288 sq.cm

प्र: A son and father goes for boating in river upstream . After rowing for 1 mile son notices the hat of his father falling in the river. After 5 min he tells his father that his hat has fallen. So they turn round and are able to pick the hat at the point from where they began boating after 5min. Find the speed of river in miles/hours ? 4486 0

उत्तर : 2. "6 mile/hr"
व्याख्या :
Answer: B) 6 mile/hr Explanation: Let the speed of river and boat be 'r' m/min and 'b' m/min.so relative speed in upstream (b-r)m/min and in downstream (b+r)m/min.Now in upstream distnce covered in 5 min is 5(b-r)milesso total distnce covered => 1 + 5(b-r)miles in upstreamIn downstream distance covered in 5min is 5(b+r)miles Now 1 + 5(b-r) = 5(b+r)1+5b-5r = 5b+5r1 = 10rr = 1/10 mile/min => 6 mile/hr.

प्र: An amount doubles itself in 15 years. what is the rate of interest ? 1465 0

उत्तर : 3. "6.66 %"
व्याख्या :
Answer: C) 6.66 % Explanation: Let the principle be Rs. PAs the amount double itself the interest is Rs. P tooSo P = P x r x 15/100=> r = 100/15 = 20/3 % = 6.66 %.

प्र: A can write 32 pages in 6 hours and B can write 40 pages in 5 hours. If they write together, in how many hours they can write 110 pages ? 4087 0

उत्तर : 4. "8 hrs 15 min"
व्याख्या :
Answer: D) 8 hrs 15 min Explanation: A can write in 1hour = 32/6 pages Similarly, B in 1 hour = 40/5 pages Together (A+B) in 1 hour = 32/6 + 40/5 = 40/3 So, A+B write 40/3 pages in 1 hour A+B write 110 pages in (3/40) x 110 Hours = 8 hours 15 min.

प्र: If in an A.P series 18th term is 29 and 29th term is 18. Then find the 49th term ? 1273 0

उत्तर : 2. "-2"
व्याख्या :
Answer: B) -2 Explanation: We know that in A.P series18th term = a + 17d29th term = a + 28dBut given a + 17d = 29..........(i)a + 28d = 18......... (ii)Solving equation (i) and (ii), we getd = -1put d = -1 in any of the above equations and we get, a = 46Now, we know 49th term can be written as, a + 48d putting the value of a and d in the above equation,a + 48d = 46 + 48(-1) = 46 - 48 = -2 Hence, the 49th term is -2.

प्र: Sushma joins a job at 20 yrs. First 3 years salary is 10,000 p.a. Afterwards every year increment of 2,000 per year for 10 years. Then salary becomes constant till retirement. At retirement average salary is 25,000. (throughout career). At what age Sushma retires ? 2363 0

उत्तर : 1. "50 yrs"
व्याख्या :
Answer: A) 50 yrs Explanation: Let age of retirement = Sso according to the given condition 25000(x-20)=10000 x 3 + 12000 + 14000 + 16000 + 18000 + 20000 + 22000 + 24000 + 26000 + 28000 + 30000 + 30000(S-33)= 30000 + 210000 + 30000S-990000= 30000S - 750000or 25000S - 500000 = 30000x - 750000or 5000x = 250000or S = 50 yrs.

प्र: Rs. 50000 is divided into two parts One part is given to a person with 10% interest and another part is given to a person with 20 % interest. At the end of first year he gets profit 7000 Find money given by 10% ? 1181 0

उत्तर : 3. "Rs. 30,000"
व्याख्या :
Answer: C) Rs. 30,000 Explanation: Let first part is 'K' and second part is 'L' then K + L = 50000---------eq1Total profit = profit on x + profit on y7000 = (K x 10 x 1)/100 + (L x 20 x 1)/10070000 = K + 2L-----------------------------------eq270000 = 50000 + Lso L = 20000 then K = 50000 - 20000 = 30000first part on 10% is = Rs.30000

प्र: The enzyme that converts glucose to ethyl alcohol is 1428 0

प्र: If a 36 cm thread is used to wrap a book, lengthwise twice and breadth wise once, what is the size of the book ? 1219 0

उत्तर : 1. "288 sq.cm"
व्याख्या :
Answer: A) 288 sq.cm Explanation: Length of the thread is 36 cms. length wise twice breath wise once then totally thrice.so 36/3 = 12.so length is 12 x 2 = 24 cmsbreath is 12 cmsArea of the book = length x breath = 24 x 12 = 288 sq.cm

प्र: An amount doubles itself in 15 years. what is the rate of interest ? 1465 0

उत्तर : 3. "6.66 %"
व्याख्या :
Answer: C) 6.66 % Explanation: Let the principle be Rs. PAs the amount double itself the interest is Rs. P tooSo P = P x r x 15/100=> r = 100/15 = 20/3 % = 6.66 %.

प्र: A can write 32 pages in 6 hours and B can write 40 pages in 5 hours. If they write together, in how many hours they can write 110 pages ? 4087 0

प्र: If in an A.P series 18th term is 29 and 29th term is 18. Then find the 49th term ? 1273 0

प्र: Sushma joins a job at 20 yrs. First 3 years salary is 10,000 p.a. Afterwards every year increment of 2,000 per year for 10 years. Then salary becomes constant till retirement. At retirement average salary is 25,000. (throughout career). At what age Sushma retires ? 2363 0

प्र: Rs. 50000 is divided into two parts One part is given to a person with 10% interest and another part is given to a person with 20 % interest. At the end of first year he gets profit 7000 Find money given by 10% ? 1181 0

प्र: The enzyme that converts glucose to ethyl alcohol is 1428 0

उत्तर : 2. "Zymase"
व्याख्या :
Answer: B) Zymase Explanation:

त्रुटि की रिपोर्ट करें

त्रुटि की रिपोर्ट करें

त्रुटि की रिपोर्ट करें

त्रुटि की रिपोर्ट करें

त्रुटि की रिपोर्ट करें

त्रुटि की रिपोर्ट करें

त्रुटि की रिपोर्ट करें

त्रुटि की रिपोर्ट करें

प्र: If a 36 cm thread is used to wrap a book, lengthwise twice and breadth wise once, what is the size of the book ? 1219 05b5cc711e4d2b4197774f3dc

उत्तर : 1. "288 sq.cm" व्याख्या :Answer: A) 288 sq.cm Explanation: Length of the thread is 36 cms. length wise twice breath wise once then totally thrice.so 36/3 = 12.so length is 12 x 2 = 24 cmsbreath is 12 cmsArea of the book = length x breath = 24 x 12 = 288 sq.cm

प्र: An amount doubles itself in 15 years. what is the rate of interest ? 1465 05b5cc711e4d2b4197774f3cd

उत्तर : 3. "6.66 %" व्याख्या :Answer: C) 6.66 % Explanation: Let the principle be Rs. PAs the amount double itself the interest is Rs. P tooSo P = P x r x 15/100=> r = 100/15 = 20/3 % = 6.66 %.

प्र: A can write 32 pages in 6 hours and B can write 40 pages in 5 hours. If they write together, in how many hours they can write 110 pages ? 4087 05b5cc711e4d2b4197774f3c8

प्र: If in an A.P series 18th term is 29 and 29th term is 18. Then find the 49th term ? 1273 05b5cc711e4d2b4197774f3c3

प्र: Rs. 50000 is divided into two parts One part is given to a person with 10% interest and another part is given to a person with 20 % interest. At the end of first year he gets profit 7000 Find money given by 10% ? 1181 05b5cc711e4d2b4197774f3b9

प्र: The enzyme that converts glucose to ethyl alcohol is 1428 05b5cc711e4d2b4197774f3b4

उत्तर : 2. "Zymase" व्याख्या :Answer: B) Zymase Explanation:

त्रुटि की रिपोर्ट करें

त्रुटि की रिपोर्ट करें

त्रुटि की रिपोर्ट करें

त्रुटि की रिपोर्ट करें

त्रुटि की रिपोर्ट करें

त्रुटि की रिपोर्ट करें

त्रुटि की रिपोर्ट करें

त्रुटि की रिपोर्ट करें

प्र: If a 36 cm thread is used to wrap a book, lengthwise twice and breadth wise once, what is the size of the book ? 1219 0

उत्तर : 1. "288 sq.cm"
व्याख्या :
Answer: A) 288 sq.cm Explanation: Length of the thread is 36 cms. length wise twice breath wise once then totally thrice.so 36/3 = 12.so length is 12 x 2 = 24 cmsbreath is 12 cmsArea of the book = length x breath = 24 x 12 = 288 sq.cm

प्र: An amount doubles itself in 15 years. what is the rate of interest ? 1465 0

उत्तर : 3. "6.66 %"
व्याख्या :
Answer: C) 6.66 % Explanation: Let the principle be Rs. PAs the amount double itself the interest is Rs. P tooSo P = P x r x 15/100=> r = 100/15 = 20/3 % = 6.66 %.

प्र: A can write 32 pages in 6 hours and B can write 40 pages in 5 hours. If they write together, in how many hours they can write 110 pages ? 4087 0

प्र: If in an A.P series 18th term is 29 and 29th term is 18. Then find the 49th term ? 1273 0

प्र: Rs. 50000 is divided into two parts One part is given to a person with 10% interest and another part is given to a person with 20 % interest. At the end of first year he gets profit 7000 Find money given by 10% ? 1181 0

प्र: The enzyme that converts glucose to ethyl alcohol is 1428 0

उत्तर : 2. "Zymase"
व्याख्या :
Answer: B) Zymase Explanation: