Question

A and B can finish a piece of work in 16 days and 12 days respectively. A started work and worked for 2 days. He was then joined by B. Find the total time taken to finish work​

Answer 1

Step-by-step explanation:

a+b=1/12

A alone can finish in 20days

A in one day =1/20

B alone work is x days

B one day work =1/x

1/A+B=1/A+1/B

1/12=1/20+1/x

1/12-1/20=1/x

5-3/60=1/x

2/60=1/x

x=30

B=1/30

alone B =30days