The car is moving at a speed of 80 km / h for half the time. The remaining half at a speed of 20m / s. Determine the overall speed.

Since the car had different speeds, but for the same time intervals, the formula for calculating the total speed from the form: V = (S1 + S2) / (t1 + t2) can be represented as: V = (V1 + V2) / 2, where V1 is the speed for the first half of the time (V1 = 80 km / h = 80 / 3.6 m / s = 22.22 m / s); V2 – speed for the remaining time (V2 = 20 m / s).

Let’s perform the calculation: V = (22.22 + 20) / 2 = 21.11 m / s.

Answer: The total vehicle speed is 21.11 m / s.