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(#M40151957) BOOK Numerical Ability question Keep an EYE

A and B undertake to do a piece of work for Rs.100. A can do it in 5 days and B can do it in 10 day. With the help of C, they finish it in 2 days. How much should C be paid for his contribution?

Asked In Book Poorva (9 years ago)

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ANUSHKA  (9 years ago)

Answer= C gets Rs.40
Let no. of days taken by C alone be x days.
A+B+C together complete full work in 2days.
C's no. of days = 1/5+1/10+1/x = 1/2
Therefore, C takes 5 days to complete full work
Now ratio of money of A+B+C = 1/5:1/10:1/5 = 10:5:10 = 2:1:2
So C's share = 2/5*100 = 40 Rs.

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R.Maheshaa  (9 years ago)

ANS: RS.70.
A can do a work in 5 days, so A's 1 day work will be 1/5.
similarly B's 1 day work will be 1/10.
(A+B)'s 1 day work will be (1/5)+(1/10)=3/10
with the help of C they completed the work in 2 days, so (A+B+C)'s 1 day work will be 1/2.
C's 1 day work will be (A+B+C)'s - (A+B)'s= (1/2)-(3/10)=7/10.
so C's Share will be (7/10)*100= Rs.70

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P.ARUNA  (9 years ago)

c gets 25 rs

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