- A7
- B8
- C6
- D11
Step-by-Step Solution
Combined rate = 1/14 + 1/21 + 1/42 = (3 + 2 + 1)/42 = 1/7 of the mural per day, so 7 days.
Answer: A) 7
Harpreet, Ishaan and Jaya can each paint a classroom mural alone in 14, 21 and 42 days respectively. If all three work on it together, how many days will the mural take?
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