BD Merit - Freelancing, BCS, Bank, Primary, Admission, NTRCA

1 . 15 men take 21 days of 8 hours each to do a piece of work. How many days of 6 hours each would 21 women take , if 3 women do as much work as 2 men ?

A. 18
B. 20
C. 25
D. 30

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Answer: Option D

Explanation:

3 women can do as much work as 2 men

∴ efficiency of women to do a piece of work, e2 = (1/3)

∴ efficiency of men to do a piece of work, e1 = (1/2)

We know,

Total work done = (no. of men or women) * (no. of days) * (no. of hours) * (efficiency)

Therefore,

m1 * d1 * h1 * e1 = m2 * d2 * h2 * e2

or, 15 * 21 * 8 * (1/2) = 21 * d2 * 6 * (1/3)

or, d2 = 30 days .

Bangladesh Bank - Assistant Director - 2016

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