Question

A and B can do a piece of work together 12 days. If A do ¾th part and remaining finished by B and takes total 22.5 days. In how many days B can do it alone?

Answer 1

Answer:

Step-by-step explanation:

A+B=5(eff)  say

Work=60

45 by A 15 by B

45/3 + 15/2

=15+7.5=22.5

So b=2

Alone in 60/2=30

Answer 2

In 90 days total work will be done by B

Step-by-step explanation:

Let the total work is 1

A will do $\frac{3}{4}$ part of the work

So amount of work done by B $=1-\frac{3}{4}=\frac{1}{4}$ part

As according to question remaining work is finished by B in 22.5 days

So $\frac{1}{4}$ part of work is done in 22.5 days

So total 1 work done by B in 22.5×4 = 90 days

So in 90 days work will be finished by B

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