The train ran for 3 hours at a speed of 63.2 km / h and 4 hours at a speed of 76.5 km / h. Find the average speed of the train.

First, let’s find out how far the train traveled in the first 3 hours, if it is known that the speed was 63.2 km / h:
S = V * T, where V is speed, T is time.
S = 63.2 * 3 = 189.6 km.
Next, we determine which path the train traveled in the next 4 hours:
S = V * T, where V is speed, T is time.
S = 4 * 76.5 = 306 km.
Now let’s find the total distance:
306 + 189.6 = 495.6 km.
Find out the total time:
3 + 4 = 7 hours.
Let’s find what the average train speed is equal to:
495.6 / 7 = 70.8 km / h.
Answer: The average speed is 70.8 km / h.