Question

to repair a school bulding 4 masons take 9days .afrer working for 3days two more masons join the work.find out in how many days the works will finish.

Answer 1

let the work of masons be x
4x=9-----1

After three days
4x +2x =3
6x =3-----2

add eqn 1 and 2

4x + 6x =9+3
10x=12

x=1.2

Thus they will take more 1.2 days to complete work together