Ramu can do piece of work in 30 days in do same work Ravi can 60 days. How long long will they take together to do it.
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The answer will be 45.
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Answer:
piece of work done by ramu in 1 day = 1/30
piece of work done by Ravi in 1 day = 1/60
amount of work both can complete the work in 1 day =
1/30 + 1/60
= 3/60 = 1/20
therefore both can complete the work in 20 days
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