Quantitative Aptitude प्रश्न और उत्तर का अभ्यास करें

प्र: Ravi and Ramu are partners in a business.Ravi contributes 1/6 of the capital for 16 months and Ramu received 2/3 of the profit. For how long Ramu's money was used ? 1868 0

  • 1
    11 months
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  • 2
    10 months
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  • 3
    9 months
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  • 4
    8 months
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उत्तर : 4. "8 months"
व्याख्या :

Answer: D) 8 months Explanation: Let the total Profit be Z.Ramu's profit share is 2/3 of profit (i.e 2Z/3)Ravi's profit is (Z-2Z/3) =Z/3Hence the profit ratio is , Ravi : Ramu = Z/3 : 2Z/3 = 1:2 Let total Capital be Rs.X and Ramu has contributed for Y months.Since Ramu's profit share is 2/3, his invest share will be 2/3 in capital. Ravi's invest for 16 months / Ramu's invest for Y months = Ravi's profit share / Ramu's profit sharei.e. (X/6 x 16) / (2X/3 x Y) = 1/2 Solving the above equation, we get Y = 8.So Ramu's money has been used for 8 months.

प्र: An individual deposited 20% of 25% of 30% of what he had into his account with a bank. If he deposited Rs.750, how much was he having initially with him before depositing ? 1467 0

  • 1
    Rs. 38000
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  • 2
    Rs. 47000
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  • 3
    Rs. 50000
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  • 4
    Rs. 35000
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उत्तर : 3. "Rs. 50000"
व्याख्या :

Answer: C) Rs. 50000 Explanation: Let 'x' be the amount he had in the bank. => 20/100(25/100(30/100(x))) = 750 x = 750 x 8000/120 = Rs. 50000

प्र: In how many ways can the letters of the word 'LEADER' be arranged ? 1040 0

  • 1
    360
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  • 2
    420
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  • 3
    576
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  • 4
    220
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उत्तर : 1. "360"
व्याख्या :

Answer: A) 360 Explanation: No. of letters in the word = 6No. of 'E' repeated = 2Total No. of arrangement = 6!/2! = 360

प्र: A boat travels 72 km downstream in 8 hours and 84 km upstream in 12 hours. Find the speed of the boat in still water and the speed of the water current ? 1558 0

  • 1
    9 and 3 kmph
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  • 2
    6 and 7 kmph
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  • 3
    8 and 1 kmph
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  • 4
    7 and 2 kmph
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उत्तर : 3. "8 and 1 kmph"
व्याख्या :

Answer: C) 8 and 1 kmph Explanation: Downstream speed = 72km/8hrs  = 9 kmphupstream speed = 84km/12hrs = 7 kmphspeed of boat = avg of downstream and upstream speedsspeed of boat = (9+7)/2kmph = 8 kmph.current speed = half of the difference of downstream and upstream speedscurrend speed = (9-7)/2kmph = 1 kmph

प्र: A train moving at 2/3 rd of its normal speed reaches its destination 20 minutes late. Find the normal time taken ? 2948 0

  • 1
    4/3 hrs
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  • 2
    2/3 hrs
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  • 3
    3/2 hrs
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  • 4
    1/4 hrs
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उत्तर : 2. "2/3 hrs"
व्याख्या :

Answer: B) 2/3 hrs Explanation: Let the original speed and time is S and Tthen distance = S x TNow the speed changes to 2/3S and T is T+20As the distance is sameS x T = 2/3Sx(T+20)solving this we get t = 40 minutes =40/60 = 2/3 hour

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उत्तर : 1. "48"
व्याख्या :

Answer: A) 48 Explanation: 3X + 4y = 240by substitute through options 48 is correct

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उत्तर : 3. "80%"
व्याख्या :

Answer: C) 80% Explanation: circumference of A = 2πr = 8 => so r = 4πvolume = π×4π2×10 = 160πcircumference of B = 2πr   = 10 => so r = 5πvolume = π×5π2×8 =  200πso ratio of capacities = 160/200 = 0.8 so capacity of A will be 80% of the capacity of B.

प्र: Today is Varun's birthday. One year, from today he will be twice as old as he was 12 years ago. How old is Varun today ? 1749 0

  • 1
    25 years
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  • 2
    24 years
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  • 3
    23 years
    सही
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  • 4
    22 years
    सही
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उत्तर : 1. "25 years"
व्याख्या :

Answer: A) 25 years Explanation: Let varun's age = x yrs. From the given conditions, x+1  =  2(x-12) x = 25 years.

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