If the car travel 54 kilometers per hour
To find the car's speed in kilometers per minute
we will first convert 1hour to minute
1 hour = 60 minute
Then
54/60 = 0.9 km per minute
The speed of the car is 0.9 kilometer per minute
The second part of the question
To find the number of kilometers travelled by the car in 20 minutes:
Let x be the number of kilometer travel by the car in 20 min
0.9 kilometer = 1 minute
X = 20 minute
cross-multiply
X = 20 x 0.9
X =18 kilometers
The car travels 18 kilo
