20 women can do work in 16 days. 10 men can complete the same work in 12 days. What is the ratio between the efficiency of a man and a woman?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 8 : 3.
Let Woman = W and Man = M
20W × 16 = 10M × 12
⇒ 320W = 120M
⇒ M/W = 320/120 = 8/3
⇒ M : W = 8 : 3