20 women can complete a work in 15 days. 16 men can complete the same work in 15 days. Find the ratio between the work efficiency of a man to a woman.

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20 women can complete a work in 15 days. 16 men can complete the same work in 15 days. Find the ratio between the work efficiency of a man to a woman.

A5:4

B4:3

C5:3

D3:2

Answer:

A. 5:4

Read Explanation:

$20W\Rightarrow15days$

$16M\Rightarrow15days$

efficiency of one woman is 15/20

efficiency of one man is 15/16

ratio of efficiency men to women is $\frac{\frac{15}{16}}{\frac{15}{20}}$ $=$ $\frac{15}{16}\times \frac{20}{15}$ $\frac{20}{16}=\frac54$ $=5:4$

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