Measuring Speed

Name the device used to measure the distance covered by a vehicle.

Name the device which is used to measure the distance travelled by a vehicle.

Name the device which is used for measuring the speed of a vehicle.

To convert $\mathrm{m}/\mathrm{s}$ into $\mathrm{km}/\mathrm{h}$, we multiply the speed with $\frac{\mathrm{X}}{5}$.
The value of $\mathrm{X}$ is

The distance between two stations is $100 \mathrm{km}$. A bus takes $2 \mathrm{hours}$ to cover this distance. Calculate the speed of the bus.

The motion of a bus is represented in meter.

Meter per second is the international unit of