A is twice as efficient as B. If they complete a piece of work together in 14 days, how many days will A alone take to finish it? MCQ with Answer and Explanation
A is twice as efficient as B. If they complete a piece of work together in 14 days, how many days will A alone take to finish it?
A. 28 days
B. 21 days
C. 35 days
D. 42 days
Answer: Option B
Solution (By JKSSB Mock Tests)
Let B's efficiency be 1 unit/day, so A's efficiency is 2 units/day. Combined efficiency = 3 units/day. Total work = 3 * 14 = 42 units. Time taken by A alone = 42 / 2 = 21 days.
Explanation:
3 Men = 5 Women => 6 Men = 10 Women. 6 men + 5 women = 10 women + 5 women = 15 women. Since 5 women take 12 days, 15 women will take (5 * 12) / 15 = 60 / 15 = 4 days.
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