40 men can build a well 4 metres high in 15 days . The number of men required to build a similar wall 5 metres high in 6 days is
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50 men needed and for 5 meters in 6 days
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40 men can build 20m high wall in 15 days
=> 1 men can build 20m high wall in 15*40 days
=> 1 men can build 1m high wall in 15*40/20 i.e. 30 days
=> 30 days 1m high wall requires 1 men
=> 30 days 50m high wall requires 1*50 men
=> 3 days 50m high wall required 1*50*10 men
Answer:
500 Men required
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