If 30 persons can dig a trench 36 m long in one day ,find the number of persons required to dig a trench 90 m long in one day
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the number of person = 30
the trench dug by them =36m
length dug by a single person = 36m÷30 =1.2m
required length to be dug = 90m
number of persons required =90m÷1.2m =75
the trench dug by them =36m
length dug by a single person = 36m÷30 =1.2m
required length to be dug = 90m
number of persons required =90m÷1.2m =75
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