Question

If 3 persons can do a piece of work in 5 days then 5 persons can do work in how many days

Answer 1

Hi!!

No. of workers. |. no.of days

3 |. 5

5 |. x

when the number of people who are working increase, automatically, the no. of days required is DECREASED (indirect variation)

so,

3/5 = x/5 ( we took the reciprocal of 5/x as it is indirect variation)

cross multiply,

3 * 5 = 5 * x

15 = 5x

x = 15/5= 3

si, the answer is: 3 days