Question

‘A’ and ‘B’ complete a certain work in 12 and 18 days respectively. If they work together then they can finish the same work in how many days?

Answer 1

Answer:

Step-by-step explanation:

'A' completes the work in 12 days, which means, every day, 'A' does 1/12 th of the work.

'B' completes the work in 18 days, which means, every day, 'B' does 1/18 th of the work.

Together, in one day, 'A' and 'B' can do a total of 1/12+1/18 = 30/216 = 5/36

Therefore, they can finish the work together in 36/5 = 7.2days.

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