The motorcyclist covered 5 km in the first 10 minutes of movement, and 12.5 km

The motorcyclist covered 5 km in the first 10 minutes of movement, and 12.5 km in the next 20 minutes. What is the average speed of a motorcyclist along the way?

Given:

S1 = 5 kilometers = 5000 meters – the length of the first section of the route;

t1 = 10 minutes = 600 seconds – the time spent on the first leg of the journey;

S2 = 12.5 kilometers = 12,500 meters – the length of the second section of the route;

t2 = 20 minutes = 1200 seconds – the time spent on the second leg.

It is required to determine the average speed of the motorcyclist V (m / s).

The total path is:

S = S1 + S2 = 5000 + 12500 = 17500 meters.

The total travel time is:

t = t1 + t2 = 600 + 1200 = 1800 seconds.

Then the average speed is:

V = S / t = 17500/1800 = 9.7 m / s.

Answer: The average speed of a motorcyclist is 9.7 meters per second.