Question

A truck travel 60 km in first hour and 80km in second hour. what is average of truck ?

Answer 1

▪ A truck travel 60km in first hour and 80km in second hour.

▪ We have to find out average speed of the truck.

Average Speed :

✏ Average speed is defined as ratio of total distance travelled to the total time taken.

✏ Average speed is a scalar quantity.

✏ SI unit of average speed is m/s

⏭ Total distance travelled = 140km

⏭ Total time taken = 2h

$\rightarrow\sf\:\overline{v}=\dfrac{140}{2}\\ \\ \rightarrow\underline{\boxed{\bf{\pink{\overline{v}=70\:kmph}}}}$

▶ Average speed of the truck =70kmph

Average Velocity :

✏ Average velocity is defined as ratio of total displacement to the total time.

✏ Average velocity is a vector quantity.

✏ SI unit of average velocity is m/s

Answer 2

Answer:

Total distance travelled =60+80

=140km

Total time taken =1 hour + 1 hour

=2 hours

average speed =140/2

=70km/hour.

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