Question

12 Men or 15 women can do a piece of
work in 21 days. Find the number of days
required to complete the same work by 6
men and 10 women.
INV 2018]
(2) 18 (3) 21 (4) 24
(1) 15​

Answer 1

Answer:

12 men take 21 days to complete a piece of work. 1 man takes (12 × 21) = 252 days.

15 women take 21 days to complete a piece of work. 1 woman takes (15 × 21) = 315 days.

In 1 day, 1 man does (1/252) of the work.

In 1 day, 1 woman does (1/315) of the work.

In 1 day, 6 men and 10 women can do 6(1/252) + 10(1/315) = (1/18) of the work.

(1/18) of the work done in 1 day.

18(1/18) of the work done in 18 days.

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