Question 119
If 45 persons can complete a work in 18 days, working 8 hours a day, then how many persons are required to complete two-thirds of the same work in 20 days, working 9 hours a day?
Solution
From mdh formula-
Total work = $$45 \times 18 \times 8 = 6480$$
Required work = $$6480 \times \frac{2}{3}$$ = 4320
by mdh formula,
$$20 \times 9 \times $$number of persons = 4320
Number of persons = 4320/180 = 24
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