If 28 men can finish a work in 15 days, 21 men can finish the same work in___________?
If 28 men can finish a work in 15 days, 21 men can finish the same work in___________?
Explanation
Time is taken by 28 men to finish the work = 15 days
Time taken by a man to finish the work = 15 × 28 days
Time taken by 21 men = (15 × 28) ÷ 21
= 420 ÷ 21
= 20 days
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ND22-1-2023