If 28 men can finish a work in 15 days, 21 men can finish the same work in
A
24 days
B
14 days
C
15 days
D
20 days
Correct Option - D
Explaination
Time and Men are inversely proportional.
Time 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
= 20 days