Question

Acan do a piece ofwork in 80 days . he works at it for 10 days and then B alone finished the remaining work in 42 days in how many days could both do it​

Answer 1

Answer:

30 days

Step-by-step explanation:

Now, A can do a piece of work in 80 days. So, let the TOTAL WORK = 80 units.

A -> 80 days = 1 unit/day

So, in 10 days, A has completed 10 units.

Remaining Work = 70 units.

Now, B finishes this in 42 days. So rate of work if B =7042 =53unit/day

Thus, A + B =1+53 = 83

So, TIME TAKEN = 8083 = 30 Days (Answer)