NCERT Solutions Class 8 Mathematics Solutions for Exercise 13.2 in Chapter 13 - Direct and Inverse Proportions

Question 15 Exercise 13.2

Q8)  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 the machine be x.

NCERT Solutions - Mathematics , Class 8 chapter Direct and Inverse Proportions Question 15 Solution image

Here the number of machines and the number of days are in inverse proportion.


\Rightarrow\ x=\frac{63\times42}{54}

\Rightarrow\ x=49

49 machines would be required.

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