A is twice as efficient as B and can complete a piece of work in 15 days less than B. In how many days can B alone complete the work? MCQ with Answer and Explanation
A is twice as efficient as B and can complete a piece of work in 15 days less than B. In how many days can B alone complete the work?
A. 20 days
B. 45 days
C. 25 days
D. 30 days
Answer: Option D
Solution (By JKSSB Mock Tests)
Ratio of efficiency of A to B = 2 : 1. Ratio of time taken by A to B = 1 : 2. Difference in time = 2 - 1 = 1 part, which corresponds to 15 days. Therefore, time taken by B = 2 * 15 = 30 days.
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