A contracter takes a contract to construct 30km of road in 6 months. He employes 450 men. If the length of road is increased by 10km and has to finish the work in 4 months, how many more men to are needed complete the work in time?
Please answer this question according to direct and inverse proportion......
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answer is 150 because 30km =450mens 10km=450/3=150
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