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Question
A contractor undertook a contract to complete a part of a stadium in 9 months with a team of 560 persons. Later on, it was required to complete the job in 5 months. How many extra persons should he employ to complete the work?
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Solution
∵ In 9 months, a part of stadium can complete by 560 persons.
∴ In 1 month, the work can be complete by 9 × 560 = 5040 persons.
∵ In 5 months, the work can be complete by `5040/5` = 1008 persons
Now, number of extra persons required to complete the work in 5 months = 1008 – 560 = 448
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