Question

A is twice as efficient as B and B is twice as efficient as if A and B together complete a work in 4 days yhen C alone can complete the work in?​

Answer 1

Answer:

Hope this help you........

Step-by-step explanation:

Let, C can do a work in x days

So, In 1 day c can work =1/x part of the work

B can do a work in x/2 days

So, In 1day B can work =2/x part of the work

A can do a work in x/4 days

So, In 1 day A can work =4/x part of the work

If A, B, C togetherly work then,

In 1day they can do the work

=(1/x)+(2/x)+(4/x)

=7/x of the work

So to complete the work working togetherly they need =x/7 days

Now according to the question,

x/7=4

x =28

Then c alone can complete the work in 28 days......