Rekha can whitewash a hall alone in 34 days, while Sunil needs 51 days. If they work together, in how many days will the hall be done? (answer in days)

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Accepted Answer

20.4. Together they do 1/34 + 1/51 = 3/102 + 2/102 = 5/102 of the hall per day, so time = 102/5 = 20.4 days.

Rekha can whitewash a hall alone in 34 days, while Sunil needs 51 days. If they work together, in how many days will the hall be done? (answer in days)

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