A factory requires 42 machines to produce a given number of articles in 63 days. How many machines would be required to produce the same number of articles in 54 days?


Let the number of machines required be x.

Ncert solutions class 8 chapter 13-67

The number of machines and the number of days are inversely proportional.

Therefore, from inverse proportionality property:-

60/80 = x/2

60×2 = 80x

x = 60×2/80

x = 120 / 80

x = (3/2) hours.



Therefore, time taken to reach destination, when car is traveling at Speed of 80 Km/h is (3/2) hours.

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