The car drove for half an hour at a speed of 90 km / h. How fast should a cyclist travel to cover

The car drove for half an hour at a speed of 90 km / h. How fast should a cyclist travel to cover the same section of the road in 1 hour 30 minutes?

The path that the car will travel:
S = V1 * t1, where S is the distance traveled by the car (m), V1 is the vehicle speed (V = 90 km / h = 90 * 1000/3600 = 25 m / s), t1 is the travel time (t = 30 min = 30 * 60 = 1800 s).
Let’s calculate the distance traveled by the car:
S = V * t = 25 * 1800 = 45000 m.
Cyclist speed:
V2 = S / t2, where t2 = 1.5 h = 1.5 * 3600 = 5400 s.
V2 = S / t2 = 45000/5400 = 8.33 m / s (30 km / h).
Answer: The cyclist must travel at a speed of 8.33 m / s (30 km / h).