- A25.2
- B52.5
- C21
- D30
Step-by-Step Solution
Combined rate = 1/42 + 1/63 = 3/126 + 2/126 = 5/126, so time = 126/5 = 25.2 days.
Answer: A) 25.2
Vikram can plaster a room in 42 days and Sunil in 63 days. If both work on it together, how many days will the job take?
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