Half of the time, when moving from one point to another, the car was moving at a constant speed of 60 km / h.

Half of the time, when moving from one point to another, the car was moving at a constant speed of 60 km / h. With what constant speed should he move the remaining time if his average speed is 65 km / h?

Let’s designate: V km / h – the speed with which the car was moving the second half of the time; t – half the time of movement.
The expression for finding the entire traversed path looks like this: 60t + V * t. The total travel time is 2t.
Let’s make an equation for the average speed:
(60t + V * t) / 2t = 65;

(60 + V) * t = 65 * 2t;

60 + V = 130;

V = 130 – 60;

V = 70;

Answer: the second half of the time, the car should move at a speed of 70 km / h.