Question

Two frinds can complete a piece of work in 5days if the first friend alone can complete the same work in 15 days how many days will the second frieends take to complete the work alone

Answer 1

Two friends can complete work in 5 days.

In one day they complete 1/5 th work

Now one of them can alone complete it in 15 days.

So in a day he does 1/15 work

First person + second person =1/5

1/15 + x =1/5

x = 1/5-1/15

x = 2/15

So the other person can do the 2/15th work.

2/15* number of days = 1

number of days = 1÷ 2/15 = 15/2= 7.5 days


The second person alone can complete the work in 7. 5 days

hope helped!