Find the speed of the car if it covers a distance of 30 km in 0.5 h.

We calculate the speed of the car using the following formula:

V = S / t, where S is the distance covered by the car (S = 30 km), t is the time of the car on the way (t = 0.5 h).

Let us bring all these tasks to the SI system:

S = 30 km: 1 km = 1000 m; 30 km = 30 * 1000 = 30,000 m.

t = 0.5 h: 1 h = 3600 s; 0.5 h = 0.5 * 3600 = 1800 s.

Let’s do the calculation:

V = 30,000 / 1800 = 16.67 m / s.

Answer: The vehicle speed is 16.67 m / s.