Question

karim can do 1/4 of a work in 5 days . how many days will he take to complete the work

Answer 1

it will take ten days

Answer 2

1/4 work in 5 days

1/4+1/4+1/4+1/4
=1...which is the complete work...

so
1/4=5
1/4*4... complete work

5*4 =20 ..

work will be completed in 20 days