Question

If 28 men can paint a wall in 21days,then how many days will 84 men paint the same wall? ​

Answer 1

Given:

28 men can paint a wall in 21 days

To find:

The number of days to paint the same wall with 84 men= ?

Solution:

This is an indirect variation since when the number of men increases days decrease.

Number of days to paint the wall by 1 man= (28 *21)/1

                                                                      = 588 days

Number of days required to paint the same wall by 84 men= 588/84

                                                                                                   = 7 days

Hence, the number of days required to paint the same wall with 84 men is 7days.