1.

X' can complete a work in 40 days while Y is 20% more effi- cient then 'X' .'Y' worked for 8 days and lift, remaining work is completed by 'Z' in 20 days. Find in how many days 'Z' can ltbegt complete the whole work alone?

Answer»

27 days
21 days
18 days
26 days

Solution :Y Can COMPLETE work alone in
`=40 xx 5/6 = 33` days (APPROX)
Let Z alone can complete work in 't' days.
ATQ,
`8/33+20/t = 1`
`rArr 20/t = 25/33rArr X = (20xx33)/25 = 26` days (approx)


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