Ram completes 60% of a task in 15 days and then takes help of rahim and rachel. Rahim is 50% as efficient as ram is and rachel is 50% as efficient as rahim is. In how many days will they complete the work?
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Ram does 1/25 of work each day
Rahim does 1/50 and rachel does 1/100 of work each day.
total wok done in one day=1/25+1/50+1/100=7/100
So, they will take 100/7 days to complete 100%
they will take 1/7 days to complete 1%
they will take 40/7 days to complete 40%
So your answer is 5.714285 days.
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