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Rohan and Sunil separately can complete a work in 8 hours and 4 hours respectively. How much time will they take when working together ?
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- 22/3
- 11/3
- 3 hours
- 2 hours
Correct Option: A
Required time taken to complete the work by both together = x y / x + y
(Here x = 8 and y = 4)
∴ Required time = (8 x 4)/(8 + 4) = 32/12 = 22/3 hours
