Math, asked by dia850, 6 hours ago

9. A can do a piece of work in 20 days and B can do the same piece of work in 30 days. They work together for a few days and then B goes away. If A finishes the remaining work in 4 days, how long do they work together?​

Answers

Answered by shiwkishor
0

Step-by-step explanation:

Work done by A in 4 days = 4/20 = 1/5

Work done by A and B together = 4/5

Work done by A and B in 1 day = 1/20 + 1/30 = 1/12

A and B work together for (4/5 )/(1/12) = 48/5

= 9 3/5;days.

Similar questions