- A8.4
- B17.5
- C7
- D9
Step-by-Step Solution
Combined rate = 1/14 + 1/21 = 3/42 + 2/42 = 5/42 per day, so time = 42/5 = 8.4 days.
Answer: A) 8.4
Ishaan can paint a boundary wall in 14 days, while Kabir takes 21 days. If both paint together, how many days will the job take?
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