If a car covers 27 km in 20 minutes, then find the distance it covers in 2 hours, if the speed remains the same.

In the case of direct proportions, quantities increase in the same direction and in the same proportions.

As $2 \mathrm{hours}=2 \times 60 \mathrm{minutes} = 120 \mathrm{minutes}$ 

=> $\frac{{\mathrm{x}}_1}{{\mathrm{y}}_1}=\frac{{\mathrm{x}}_2}{{\mathrm{y}}_2}$

=> $\frac{27}{20}=\frac{{\mathrm{x}}_2}{120}$

=> ${\mathrm{x}}_2=\frac{3240}{20}$

=> ${\mathrm{x}}_2=162 \mathrm{km}$