Question

What is the following measure in a car?
A. $\left( {\text{a}} \right)\,\,$Speedometer
B. $\left( {\text{b}} \right)\,$ Odometer

Answer 1

Hint: Speedometer is a speed measuring meter which is generally used in every vehicle and displays the instantaneous speed of the vehicles.
Odometer is a device that is used to measure the distance travelled by a car or any other automobiles. It is usually present in the dashboard of a car.

Complete step by step solution:
Speedometer is an instrument that indicates the instantaneous speed of a vehicle, usually for the purpose of maintaining a sensible pace. Nowadays no automobiles are equipped without a speedometer intact.
Two basic types of speedometer are present :
$\left( 1 \right)\,$ Mechanical
$\left( 2 \right)$ Electrical
Generally we define speed as distance travelled divided by the time taken by the car, but it is the average speed which we are talking about. While a speedometer gives the instantaneous speed of the
The Odometer is an instrument used for measuring the distance travelled by a vehicle such as car, bicycle etc. It is the most important instrument in a car or any other vehicle. It plays the main role while selling an old vehicle because a buyer first checks the kilometer traveled by the vehicle.
It is of two types:
$\left( 1 \right)$ Digital
$\left( 2 \right)$ Mechanical
The kilometer travelled by a car is one of the most important factors which is only measured by an odometer, which is present in the dashboard of a car.

Note:
Generally many drivers make a wrong assumption about speedometer and odometer. They said both jobs are the same. But the speedometer tells us the amount of wheel rotation while the odometer tells how much distance a wheel travelled.