If 7 men and 4 women working together, can do five times as much work per hour as one man and one woman together, then the ratio of the work done by a man and that of a woman for a given time is:
Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4 i.e. 1:2.
Work done by 1 man per hour = M
Work done by 1 woman per hour = W
7M + 4W = 5(M + W)
7M − 5M = 5W − 4W
2M = W
M : W = M : 2M = 1 : 2