Question

11. The rates of working powers of two men are in the ratio 3:5. The numbers of days taken by them to finish a work will be in the ratio

(A) 3:5

(C) 3:8

(B) 5:3

(D) 8:3.
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Answer 1

Answer:

5:3

Step-by-step explanation:

If the power is more the time deacreases so they are in inverse propertions

3*5=5*3

Answer 2

Given:

The rates of working powers of two men are in the ratio 3:5. (P1 : P 2)

To Find:

The ratio of the numbers of days taken by them to finish a work (T1 : T2)

Solution:

The greater the working power, the lesser the time needed to complete the work.

Thus, the working power is inversely proportional to the number of days taken by them to finish the work.

This can be written as,

P1 / P2 = T2 / T1

T2 / T1 = 3 /5

T1 / T2 = 5 / 3

T1 : T2 = 5:3 (Option b)

The number of days taken by them to finish a work will be in the ratio 5:3. Thus the answer is option (b).