Answer :

Answer:

= 40km/hours

Explanation:

Distance traveled: 100km

Time taken: 2 1/2 or (2.5) hours

Average speed:

100/2.5 = 40

The average speed in km per hour is 40 km/hour if a motorist travels 100km in 2 1/2 hours the answer is 40 km/hour.

What is the distance?

Distance is a numerical representation of the distance between two items or locations. Distance refers to a physical length or an approximation based on other physics or common usage considerations.

The complete question is:

If a motorist travels 100km in 2 1/2 hours, what is his average speed in

km per hour?​

We have:

The distance; a motorist travels  = 100 km

The time he takes = 2 1/2 hours

or

The time he takes = 5/2 hours

or

The time he takes = 2.5 hours

The average speed in km per hour = distance/time

The average speed in km per hour = 100/2.5

The average speed in km per hour = 40 km/hour

Thus, the average speed in km per hour is 40 km/hour if a motorist travels 100km in 2 1/2 hours the answer is 40 km/hour.

Learn more about the distance here:

brainly.com/question/26711747

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