Question

36.
A and B can complete a work alone in 18 days and 24 days respectively. If B started work alone and after
3 days A also joined then in how many days whole work will be completed.
1. 6 days
2. 12 days
3.8 days 4. 10 days
5.15 days

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Answer 1

Answer:

Let the complete work be finished in= x- days.

So(x-3)/18 + x/24= 1

Up on simplification we get,

= 4(x-3)+ 3x= 72.

=7x= 72 + 12 = 84

Therefore x= 84/7= 12- days.

So the complete work will be finished in 12- days