Question

A truck with a radius of 0.420m has tires that travel at a speed of 34.4m/s. What is the speed of the truck in kilometers per hour?

1) 123.84 km/h
2) 124.16 km/h
3) 124.48 km/h
4) 124.80 km/h

Answer 1

The speed of the truck in kilometers per hour, when converted from 34.4 m/s, is 123.84 km/h (answer 1).

Step-by-step explanation:

To calculate the speed of the truck in kilometers per hour, we need to convert the given linear velocity in meters per second to kilometers per hour. The given velocity of the truck is 34.4 m/s. To convert meters per second to kilometers per hour, we multiply by the conversion factor 3.6, because 1 m/s is equivalent to 3.6 km/h.

Therefore, the speed of the truck in kilometers per hour is:

(34.4 m/s) × (3.6 km/h per m/s) = 123.84 km/h.

This calculation results in answer choice 1) 123.84 km/h as being correct.