Question

Four friends arranged a odometer reading 80321 km at 8:30 am. When observed again at 8:50 am, the odometer reading was 80336 km. What distance had they covered during this time. Also, find the speedof the car in km/min .Express the speed in km/h also

Answer 1

$$\begin{gathered} \mathrm{Distance}\mathrm{covered}: \\ \mathrm{d}=80336-80321 \\ =15\mathrm{km} \\ \mathrm{Speed}\mathrm{of}\mathrm{the}\mathrm{car}\mathrm{in}\mathrm{km}/\min : \\ \mathrm{Speed}=\frac{15}{20} \\ =0.75\mathrm{km}/\min \\ \mathrm{Speed}\mathrm{of}\mathrm{the}\mathrm{car}\mathrm{in}\mathrm{km}/\mathrm{h}: \\ \mathrm{Speed}=\left(0.75\frac{\mathrm{km}}{\min }\right)\times \left(\frac{60\min }{1\mathrm{h}}\right) \\ =45\mathrm{km}/\mathrm{h} \end{gathered}$$