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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?

Answer:

Solution:

Let the number of the machine be x.

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

\therefore\frac{63}{5}=\frac{x}{42}

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

\Rightarrow\ x=49

49 machines would be required.

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