A car covers $ 18 \mathrm{km} $ using $ 1 \mathrm{L} $ of petrol. Find the distance it can cover using $ 7 \frac{1}{2} \mathrm{L} $ of petrol.
Given: A car covers \( 18 \mathrm{km} \) using \( 1 \mathrm{L} \) of petrol
To do: Find the distance it can cover using \( 7 \frac{1}{2} \mathrm{L} \) of petrol
Solution:
Let us convert $7 \frac{1}{2}$ to improper fraction:
$7 \frac{1}{2} = 7 + \frac{1}{2}$
$= \frac{15}{2}$
With 1L, the car can cover 18 km
With $\frac{15}{2}$ L, the car will cover $18 \times \frac{15}{2}$
=$ 9\times15$
= 135 km
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