Question

90 person can dig a well in 40 days. after they have worked for 10 days,how many more persons should be employed so as to complete the work in another 20 days?

it is in direct and inverse variation

Answer 1

Total work to do =90x40=3600unit

Work done in 10 day =90x10=900 units

Work still to do =3600-900=2700 units

If 90 person do this work it will take 30 day but we want to complete it in 20 day

Then

90x30=personx20

person required=2700/20

=270/2

=135

Total person =135

More person came =135-90=45

This is ur ans hope it will help you

Answer 2

45 is the correct answer