Aptitude - Time and Work - Discussion

@Neeraj-A will finish the work 60 days lesser than B,means if B takes 60 days to complete the work,A takes 1 day.

A will finish the work 60 days lesser than B.

What is it mean please explain?

Thanks harsha.

Thanks Showry for given the simple and correct ans.

Awesome explanation HARSHA

Ratio of times taken by A and B = 1 : 3.

That is If A takes 1 day B takes 3 days
Time Difference is 3-1 = 2 days

Here is the tricky part :
If A takes 1/2 day B takes 3/2 days
Time Difference is 3/2 - 1/2 = 1 days

When time difference is 60 days (Just mulitply by 60)
A takes 60/2 and B takes 3*60/2

So, A takes 30 days to do the work.
and B takes 90 days to do the work.

A's 1 day's work = 1/30
B's 1 day's work = 1/90

(A + B)'s 1 day's work = (1/30 + 1/90)= 4/90 = 2/45

A and B together can do the work in 45/2 = 22+1/2

If difference of time is 60 days 3*60/2 = 90 days.

I can't get this step?

Please explain.

THANK U SHEETAL,your short cut method is simply super.there is no words to say

We can use a simple formula here:[(KL)/k squqre-1)]

-->here K=3(efficiency),L=60(time) so (3*60/(3*3)-1)=>180/8=221/2

I tell that A is thrice as good as B so it should be 3:1 na.

Am I right?