Question 27

Manju takes 16 days to complete a work. If she works with her friend Jenny they complete it in 12 days. How many days will it take for Jenny to complete the work alone?

Solution

Manju does full job in 16 days.

In 1 day he will do $$1/16$$part of job.

Manju and Jenny together does full job in 12 days.

So,they together will do $$1/12$$ part of job in 1 day.

So, Alone Jenny will do $$((1/12)-(1/16))$$ or 1/48 part of job in 1 day.

So,Jenny will finish the job in 48 days.

A is correct choice.

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