Question

A can do a work in 60 days. he works for 15 days and later b alone completes the work in 30 days. in what time will they together complete the work?

Answer 1

Let assume total work =60unit
So A's one day work =1unit
In 15 day =15 unit
Let =45
B completes it in 30
So one day work of b =45/30=1.5


So if do 1 unit work and b=1.5
Then a+b=2.5
To do =60
Time taken=60/2.5=24day