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Question
If 45 persons can complete a work in 20 days, then the time taken by 75 persons will be ______ hours.
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Solution
If 45 persons can complete a work in 20 days, then the time taken by 75 persons will be 288 hours.
Explanation:
∵ 45 persons can complete a work in 20 days.
∴ 1 person can complete a work in 45 × 20 i.e. 900 days.
Similarly, 75 persons can complete the same work in `900/75` = 12 days
= 12 × 24 ...[∵ 1 day = 24 h]
= 288 h
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