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Leela can stitch a batch of curtains in 24 days and her assistant Kiran in 56 days. How many days do they need if they work on the batch together?

Competition practiceTime & Work / Pipes
  • A16.8
  • B40
  • C18
  • D15

Step-by-Step Solution

Together per day: 1/24 + 1/56 = 7/168 + 3/168 = 10/168. Time = 168/10 = 16.8 days.
Answer: A) 16.8

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