Amit can do a piece of work in 25 days and Ridhi can do it in 20 days They work for 5 days and then ...........

Quantitative Aptitude (CDS) Time and work

Amit can do a piece of work in 25 days and Ridhi can do it in 20 days. They work for 5 days and then Amit goes away. Ridhi will finish the remaining work in how many days?

16 days

11 days

12 days

None of these

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Explanation:

Amit and Ridhi one day work is =1/25 + 1/20
=9/100
5 day work=45/100
remaining work is 55/100
let Ridhi will finish the work in x days
x/20=55/100
x=11 days