- A5
- B15.7
- C6
- D4
Step-by-Step Solution
Combined rate = 1/12 + 1/15 + 1/20 = (5 + 4 + 3)/60 = 12/60 = 1/5 of the work per day, so 5 days.
Answer: A) 5
Kamla, Rita and Seema can stitch a batch of uniforms in 12, 15 and 20 days respectively. Working together, how many days will they need?
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