Question

3persons can build a wall in 4days ,then 4 persons can build it in

Answer 1

number of days taken by 3 persons =4
number of days taken by 4 persons is less than the 3 persons.
so,4×3/4=3
therefore 4 persons can build it in 3 days

Answer 2

Hi friend,

This is a inverse variation question-

Take the days taken x

3*4=4*x
12=4x
12/4=x
3=x
x=3 days.

4 people can do a work in 3 days according to the question.

Hope it helped you...........