An algebra problem by Tammu Triveni

Algebra Level 2

15 boys take 28 days of 6 hours each to do a work. How many days of 8 hours each would 21 boys take to do the same work.

10 7 15 12

Tammu Triveni by Tammu Triveni , 26, India

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1 solution

Deepak Gowda
Aug 2, 2014

Since the work done is same, 15B * 28D* 6hrs = 21B * x * 8hrs, solving we get x equal to 15 days.

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how come the number of boys affects the answer ? .. the work is done for 6 hours a day .. so basically, 15 boys did the work in 28*6 =168 hours .. so the work takes 168 hours of work .. according to this if 21 boys work for 8 hours per day the answer should be > total number of hours taken for the work to complete(168) divided by the number of hours worked per day i.e. 168/8 = 21 ..

Chinmay Rane - 6 years, 5 months ago

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