NCERT Solutions Class 8 Mathematics Solutions for Exercise 13.1 in Chapter 13 - Direct and Inverse Proportions

Question 7 Exercise 13.1

Q4)  A machine in a soft drink factory fills 840 bottles in six hours. How many bottles will it fill in five hours?



Let the number of bottles filled by the machine in five hours be x.

NCERT Solutions - Mathematics , Class 8 chapter Direct and Inverse Proportions Question 7 Solution image

Here ratio of hours and bottles are in direct proportion.

\frac{6}{840}=\frac{5}{x}\Rightarrow6\times x=5\times840

\Rightarrow x\ =\ \frac{5\times840}{6}=700 bottles.

Hence the machine will fill 700 bottles.

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