Question

A and B can dig a trench in 30 days . If B is twice as good as A in his work , in how many can A alone complete the work .
Hint :- A 's one day work = B 's
1/2 days work ​

Answer 1

Answer: 90 days

Step-by-step explanation:

Let, A 's one day work = x

Then by question B 's one day work = 2x

Given that,A and B can dig a trench in 30 days

Then, (2x+x)×30=90x is the total work of A and B

Now, A can do the work x in 1 days

A can do the total work 90x in 90x/x=90 days