Question

A completed a work in 20 days. Find the time taken by B alone if he is 25% more efficient than A.

1. 12 days
2. 10 days
3. 15 days
4. 16 days
5. 14 days

Answer 1

Correct Answer - Option 4 : 16 days

Given:

Time taken by A to complete the work = 20 days.

B is 25% more efficient than A

Calculation:

Let the time taken by B to complete the work = x days

Ratio of time taken by B and A = 125 : 100 = 5 : 4

⇒ 5 : 4 ∷ 20 : x

⇒ x = (4 × 20)/ 5 = 16 days.

∴ Time taken by B to complete the work is 16 days.