Harish and Peter working separately can paint a building in 18 days and 24 days

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Question

Harish and Peter working separately can paint a building in 18 days and 24 days respectively. If they work for a day alternately, Harish beginning, in how many days, the painting work will be completed ?

Options:

A . 41/2 days.

B . 21/2 days

C . 63/4 days

D . 65/4 days

Answer: Option A

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