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Question

A and B can do a piece of work in 30 days. A alone do the work for 16 days and B alone can do the remaining work in 44 days. Then in how many days B alone do the work ?

A
30 days
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B
40 days
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C
50 days
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D
60 days
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Solution

The correct option is B 60 days
Let A's one day work =x
B's one day work =y
(A + B)'s one day work,
x+y=130.............(1)
In next condition,
16x+44y=1.............(2)
On solving these two equations, we get
x=160 and y=160
So, B can complete the work alone in 60 days.

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