Question

A can do a piece of work in 25 days and b can do the same work in 30 days. They work together for 5 days, how much of work is left ?

Answer 1

Answer:

A can complete work in 1 day = 1/25

B can complete work in 1 day = 1/30

A and B together complete work in 1 day =

1/25 +1/30= 6+ 5/150

=> 11/ 150

There 5 days work together = 5 × 1 day work

=> 1- 55 /150

=> 95 / 150

Now remaining work is done by B

Let B takes X days to complete it

then,

1/30× X = 95/150

=> 95×30 /150

=> 19 days Remaining

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@GauravSaxena01