Question

A can finish a piece of work in 12 hours while B can finish it in 15 hours. Time taken by both to finish

it working together will be ?​

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

6.66 hour

Step-by-step explanation:

for these sum we have to make the number in verse for example x = 1/x

1/12 + 1/15 = 9/60 ( common 60 )

now reverse it 60/9

so 6 2/3 in short  

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