Question

A car travels 54 km in 45 minutes. Express its speed in meters/second.

a) 30 m/s
b) 40 m/s
c) 45 m/s
d) 60 m/s

Answer 1

To express the speed of the car in meters per second, we need to convert the distance traveled from kilometers to meters and the time from minutes to seconds. Given that the car travels 54 km in 45 minutes, the speed of the car is 20 m/s.

Step-by-step explanation:

To express the speed of the car in meters per second, we need to convert the distance traveled from kilometers to meters and the time from minutes to seconds.

Given that the car travels 54 km in 45 minutes, we can convert the distance from kilometers to meters by multiplying by 1000 (1 km = 1000 m). So, 54 km = 54,000 m. We can also convert the time from minutes to seconds by multiplying by 60 (1 minute = 60 seconds). So, 45 minutes = 2700 seconds.

To find the speed, we divide the distance by the time. Therefore, the speed of the car is 54,000 m / 2700 s = 20 m/s.