Question

A alone can do a piece of work in 12 days and B alone can do it in 15 days, find the time taken (in days) when both A and B work together. *

ans in decimal

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Answer 1

6.6 days or 6 days 16 hours

From the question,

A can do 1/12 work in one day

B can do 1/15 work in one day

A and B together can do 9/60 of the work in one day.

From this we can get to know that both require 60/9 days to do it which is nothing but 6.6 days or 6 days 16 hours

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