A does 1/3 of work in 10 days, B completes 1/4 of the same in 5 days. Who is more efficient and by what percentage?
Show answer & explanation
Correct answer: D
Explanation
Given:
A does 1/3 of the work in 10 days
B does 1/4 of the work in 5 days
A's 1 day rate = (1/3) ÷ 10 = 1/30
B's 1 day rate = (1/4) ÷ 5 = 1/20
B : A = (1/20) : (1/30) = 30 : 20 = 3 : 2
Difference = 1 part
Percentage excess = (1/2) × 100 = 50%