Question

1. A can do a piece of work in 15 days while B can do it in 10 days. How long will they take together
to do it?
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Answer 1

Answer:

6 days

Step-by-step explanation:

In 15 days A do a piece of work.

In 1 days A can piece of work=1/15

In 10 days B do that work.

In 1days B can do that work=1/10

If they will work A and B together=1/15+1/10

=5/30

=6 days

Answer 2

Step-by-step explanation:

A 1 day work=1/5

B 1 day work =1/10

(A+B)1 day work=(1/15+1/10)

=5/30= 6

they need 6 days to complete the work together.