Question

Please solve Q.7 , 8 and 9

Answer 1

1. A's 1 day work = 1/20
B's 1 day work = 1/15
A and B's 1 day work = 1/20 +1/15= 7/60
A and B 6 day work = 7/60 ×5= 7/12

Work left for B= 1-7/12 =5/12
days required by B to finish the 1 work = 15 days.
Days required to finish 5/12 Work =5/12×15=25/24.

2.B's 5 days work = 110∗5=12
Remaining work =1−12=12
A can finish work =15∗12=7.5days

3. Sorry I don't know