SSC CPO SI and ASI 2015 Paper

Question : 133 of 199

Marks: +1, -0

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

Solution:

(3)
A's 1 day's work

= {1}/{25}

B's 1 day's work

=\ {1}/{30}

So,

(A+B)^{\ '} 5

days' work

=5\ (\ {1}/{25}+ {1}/{30}\ )=\ {11 \×5}/{150}= {11}/{30}

Remaining work will be

1- {11}/{30}= {19}/{30}

Go to Question:

Prev Question

Next Question