A alone can do a piece of work in 12 days and B can do it 15 days. what part of the work will they do in 3 days?
Answers
Answered by
12
Answer:
A's one day work=1/12
B's. .. = 1/15
A+B's .... 1/12+1/i5=5/60 +4/60=9/60
A+B's 3 days work=9/60x3=27/60
= 9/20
Similar questions