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If 40 men working 9 hours a day can finish a work in 21 days, in how many days will 27 men working 10 hours a day do the same work?
- A1 hr
- B2 hrs
- C3 hrs
- D4 hrs
Correct answer: D
Discussion 1
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CCommunity
4 hrs
That is, 1 work done = 40 × 9 × 21
Then, 40 × 9 × 21 = 27 × 10 × ? days
Therefore, ? days = 40× 9 × 21 /27 × 10 = 28 days.
= 4 hours.
That is, 1 work done = 40 × 9 × 21
Then, 40 × 9 × 21 = 27 × 10 × ? days
Therefore, ? days = 40× 9 × 21 /27 × 10 = 28 days.
= 4 hours.