Question

If 20 men assemble 8 machines in a day, how many men are needed to assemble 12 such machines per day
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Answer 1

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let the number of men needed to assemble 12 machines be x

more men will be needed to assemble more machines. so it is a case of direct variation

number of machines = 8 12

number of mans = 20 x

note : this should put in box

8/20=12/x = x= 20×12/8=30

the number of men required are 30.

Answer 2

let the number of men needed to assemble 12 machines be x

more men will be needed to assemble more machines. so it is a case of direct variation

number of machines = 8 12

number of mans = 20 x

note : this should put in box

8/20=12/x = x= 20×12/8=30

the number of men required are 30.

hope i help you