The cars speed in kilometres per hour is = 87.2 Km/hr
The speed of the car = d/t
The distance(d) travelled by the car = 41 kilometers
The time(t) taken to cover the distance = 28 minutes
To solve, convert minutes to hours
But 60 mins = 1 hour
28mims = X
cross multiply,
X = 28/60
X = 0.47hour
To calculate the speed substitute d and t with it's variables provided.
speed = 41/0.47
=87.2 Km/hr ( which is to the nearest tenth)
Therefore, The cars speed in kilometres per hour is = 87.2 Km/hr
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