Question

a can do a work in 80 days where b can do a work in 100 days they worked together for 20 days after that be left away how many days will it take to complete the remaining work .​

Answer 1

Step-by-step explanation:

Let A and B work for 20- days and then A- alone completes the work in N- days, then

(20+N)/80 + 20/100 = 1

So 5(20+N)+ 4(20) = 400

So 5N= (400- 180)= 220

So N= 220/5= 44- days

. Therefore A will finish the remaining unfinished work in 44- days

Answer 2

Answer:

44

Step-by-step explanation:

ease refer to the attachment. i hope it helps