A motor ship and a boat sailed from one pier simultaneously in opposite directions. After 2h. the distance between

A motor ship and a boat sailed from one pier simultaneously in opposite directions. After 2h. the distance between them was 120 km. With what average speed did the motor ship sail if its speed was 2 times less than the speed of the boat?

Let’s find the speed of removal of the motor ship and boat:
120: 2 = 60 km / h
We take the speed of the ship for x, then
2 * x – boat speed
since the motor ship and the boat moved in different directions, the removal speed is equal to the sum of their speeds:
x + 2 * x.
Then we get the equation:
x + 2 * x = 60
3 * x = 60
x = 20