Question

a can do a piece of work in 15 days and b can do the same piece of work in 12 days what part of work they can do in 3 days​

Answer 1

Answer:

9/20

Step-by-step explanation:

a do the work in 1 day =1/15

b do the work in 1 day =1/12

both do the work in 1 day =1/12+1/15=3/20

• in 3day they do = 9/20