Question

12. A alone can do a piece of work in 12 days and B alone can do it in 15 days
. W
part of the work will they do in 3 days?​

Answer 1

Step-by-step explanation:

part of work done by A alone in 1 day = 1/12

part of work done by B alone in 1 day = 1/15

if they work together, then part of work done by A and B together in 1 day = (1/12) + (1/15) = 9/60 = 3/20

Now,

part of work done together in 3 days = 3 × (3/20) = 9/20

Ans.

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