The first half of the time the body goes at a speed of 30 km / h, and the second half at a speed of 50 km / h

The first half of the time the body goes at a speed of 30 km / h, and the second half at a speed of 50 km / h. Find the average speed.

Initial data: V1 (body speed in the first half of the time) = 30 km / h; V2 (body speed in the second half of the time) = 50 km / h.

Since the body had different speeds at equal intervals of time, the average speed of movement is determined by the formula: V = (V1 + V2) / 2.

Let’s calculate: V = (30 + 50) / 2 = 80/2 = 40 km / h.

Answer: The average speed is 40 km / h.