Question

P can do awork in 15 days and q can do a work in 20 days .If they work together for 4 days .What is the fraction of work left

Answer 1

Answer:

8/15

Step-by-step explanation:

A-15 days

B-20 days  

get the LCM of A and B(15 and 20)

LCM=60

therefore,

A-15-4=60

B-20-3=60

A+B for 1 day= 7 units

A=B for 4 days = 4*7

                         = 28

=28/60

=8/15