Question

marks
A works thrice as much as B. If A
takes 60 days less than B to do a
work, then find the number of days it
would take to complete the work, if
both work together.
24 days
22.5 days.
21 days
25.5 days​

Answer 1

Explanation:

221/2 days

Ratio of times taken by A and B =1:3

The time difference is (3−1)2 days while B takes 3 days and A takes 1 day.

If difference of time is 2 days, B takes 3 days.

If difference of time is  60 days, B takes (23×60)=90 days.

So, A takes 30 days to do the work.

A's 1 day's work =301

B's 1 day's work =901

(A+B)'s 1 day's work =(301+901)=904=452

∴ A and B can do the work in 245=2221 days.