Bank Exams प्रश्न और उत्तर का अभ्यास करें

प्र: Hemavathi gets 3 marks for each right sum and loses 2 marks for each wrong sum. He attempts 35 sums and obtains 60 marks. The number of sums attempted correctly is ? 1205 0

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    23
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    24
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    25
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  • 4
    26
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उत्तर : 4. "26"
व्याख्या :

Answer: D) 26 Explanation: Let, Hema attempted 'k' sum correctly, then k x 3 -2 x(35-k) = 605k = 130k = 26 so 26 correct sums.

प्र: The sum of one-half, one-third and one-fourth of a number exceeds the number by 22. The number is 1244 0

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    264
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    284
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    215
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    302
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उत्तर : 1. "264"
व्याख्या :

Answer: A) 264 Explanation: Let the number be 'x'. Then, from given data x/2 + x/3 + x/4 = x+2213x/12 = x+22x = 264

प्र: A single pipe of diameter x has to be replaced by six pipes of diameters 12 cm each. The pipes are used to covey some liquid in a laboratory. If the speed/flow of the liquid is maintained the same then the value of x is ? 1639 0

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    14.69 cm
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    29.39 cm
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    18.65 cm
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    22.21 cm
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उत्तर : 2. "29.39 cm"
व्याख्या :

Answer: B) 29.39 cm Explanation: Volume of water flowing through 1 pipe of diameter x = Volume discharged by 6 pipes of diameter 12 cms.   As speed is same, area of cross sections should be same.    Area of bigger pipe of diameter x = Total area of 6 smaller pipes of diameter 12  i.e πR2 = 6πR12    Here R = R and R1 = 12/2 = 6    ⇒R2 = 6×6×6    R = 14.696    => D = X = 14.696 * 2 = 29.3938 cm.

प्र: Which country has built the world's largest amphibian aircraft ? 1068 0

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    Japan
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    Russia
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    China
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    India
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उत्तर : 3. "China"
व्याख्या :

Answer: C) China Explanation: China's amphibian aircraft, which is stated to be the world's largest, has successfully passed engine tests and is expected to make its maiden flight in the first half of the year 2017.

प्र: Population of a colony of mosquitoes is increasing by 20% per day. If the population on Monday was 3000, on which day of that week the population would be 5184 ? 1737 0

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    Thursday
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    Friday
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    Tuesday
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    Monday
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उत्तर : 1. "Thursday"
व्याख्या :

Answer: A) Thursday Explanation: Given monday population = 3000Per day 20% increase in population. Tuesday population = 3000 + 3000x20/100 = 3000 + 600 = 3600 Wednesday population =3600 + 3600x20/100 = 3600 + 720 = 4320 Thursday population = 4320 + 4320x20/100 = 4320 + 864 = 5184 So that day is Thursday.

प्र: Two parallel chords on the same side of the centre of a circle are 5 cm apart. If the chords are 20 and 28 cm long, what is the radius of the circle? 1075 0

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    14.69 cm
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    15.69 cm
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    18.65 cm
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    16.42 cm
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उत्तर : 2. "15.69 cm"
व्याख्या :

Answer: B) 15.69 cm Explanation: Draw the two chords as shown in the figure. Let O be the center of the circle. Draw OC perpendicular to both chords. That divides the two chords in half.So CD = 10 and AB = 14. Draw radii OA and OD, both equal to radius r.We are given that BC = 5, the distance between the two chords. LetOB = x. We use the Pythagorean theorem on right triangle ABO AO² = AB² + OB² r² = 14² + x² We use the Pythagorean theorem on right triangle DCO DO² = CD² + OC² We see that OC = OB+BC = x+5, so r² = 10² + (x+5)² So we have a system of two equations: r² = 14² + x² r² = 10² + (x+5)² Since both left sides equal r², set the right sidesequal to each other. 14² + x² = 10² + (x+5)² 196 + x² = 100 + x² + 10x + 25 196 = 125 + 10x 71 = 10x 7.1 = x r² = 14² + x² r² = 196 + (7.1)² r² = 196 + 50.41 r² = 246.41 r = √246.41 r = 15.69745202 cm

प्र: An express train takes 4 seconds to enter tunnel which is 1 km long. If it is traveling at 108 km an hour, how long will it take to pass completely through the tunnel ? 1443 0

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    33 sec
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    37.33 sec
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    36.43 sec
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    32 sec
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उत्तर : 2. "37.33 sec"
व्याख्या :

Answer: B) 37.33 sec Explanation: Speed = 108 km/hrenter a tunnel,, means that the train covers a distance equal to its own lengthso (108 x 5/18) = x/4 where x= length of trainhence x = 120 mtrsto pass completely train has to travel a distance = (x + tunnel length) that is 1120 mtrs.so (1120/t) = (108x5/18)t = 37.33 sec

प्र: The market was full of people ……….. attractive clothes of different styles. 43333 0

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    showing
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    watching
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    Having
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  • 4
    wearing
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उत्तर : 4. "wearing"
व्याख्या :

Answer: D) wearing Explanation: The market was full of people wearing attractive clothes of different styles.

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