If 45 persons can complete a work in 20 days,

Question:

If 45 persons can complete a work in 20 days, then the time taken by 75 persons will be ______ hours.

Solution:

45 persons complete a work in 20 days

1 person can complete work in = 45 × 20 = 900 days

Time taken by 75 persons = 900/75 = 12 days = 12×24 = 288 hr

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