Question

24. A and B can do a piece of work in 7 days and 8 days respectively. If they
work for alternatively, A starting first, then in how many days will the work
be completed ?
give full and solved answer please​

Answer 1

Answer:

In 1 day A does 1/7 work and B does 1/8 work

Suppose they finish the work in n days

Then A has worked n/7 and B has worked n/8

Then n/7 + n/8 =1

n=56/15=approximately 4 days