Mathematics Question For Railway Group D,RPF, Rajasthan SI 06-10-2018

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Question(1) A and B get together a work in 72 days. B and C can complete it in 120 days and A and C can be completed in 90 days. Accordingly, if A, B and C work together, then how much will they do in 3 days?

 A और B मिल कर एक कार्य 72 दिनों में करते है | B और C उसे 120 दिनों में तथा A और C उसे 90 दिनों में पूरा कर सकते है | तदनुसार यदि A,B और C तीनों मिल कर काम करें तो वे 3 दिनों में कितना कार्य कर देंगे ?

(A) 1/20

(B) 2/43

(C) 3/25

(D) 2/37

Question(2) A is a better worker than B, and they can work together in 14 days. Accordingly, if A alone does that work, how long will he complete?

 A, B की तुलना में बेहतर कामगार है और वे दोनों मिलकर एक कार्य 14 दिनों में पूरा कर सकते है | तदनुसार यदि A अकेला उस काम को करें तो वह कितने दिनों में पूरा कर देगा ?

(A)22

(B)25

(C)21

(D)29

Question(3) A, B can accomplish the same work in less than 5 days. If both can do the same work in 100/9 days, then how long will B alone do the same work?

  A, B द्वारा किए जाने वाले उसी कार्य को 5 दिन कम में पूरा कर सकता है | यदि दोनों मिलकर वही कार्य 100/9 दिनों में कर सकते है तो अकेला B उसी कार्य को कितने दिनों में कर लेगा ?

(A)28

(B)30

(C)23

(D)25

Question(4) A and B can do one work in 20 days. B and C can do the same work in 10 days and in C and A 12 days. According to how many days can A, B, C complete that work together?

  A तथा B मिलकर एक कार्य 20 दिनों में कर सकते हैं| B तथा C उसी कार्य को 10 दिनों में और C तथा A 12 दिनों में कर सकते है | तदनुसार A,B, C एक साथ वह कार्य कितने दिनों पूरा कर सकते है ?

(A) 23/4

(B) 60/7

(C) 63/3

(D) 31/7

Question(5) A can do a work within 21 days. B is 40% more efficient than A. Are the days expected by B to finish the same work alone?

  A एक काम को 21 दिन में कर सकता है| B,A से 40% अधिक कुशल है | B द्वारा उसी काम को अकेले समाप्त करने के लिए अपेक्षित दिन हैं?

(A)15

(B)17

(C)11

(D)16

All Solutions (1-5):

Que(1).Ans-(A)

Que(2).Ans-(C)

Que(3).Ans-(C)

Que(4).Ans-(B)

Que(5).Ans-(A)

 

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