Two motor ships left the same pier at the same time in the same direction. After 30 minutes, the distance between them was 3 km

Two motor ships left the same pier at the same time in the same direction. After 30 minutes, the distance between them was 3 km. Find the speed of the second motor ship if the speed of the first is less than the speed of the second and equals 250 m / min?

1) How many kilometers did the first motor ship go? To find the path, you need to multiply the speed by time.
250 * 30 = 750 (m).
2) How many kilometers did the second motor ship cover?
3 km + 750 m = 3000 m + 750 and = 3750 m.
3) What is the speed of the second motor ship? To find the speed, the distance traveled must be divided by the time.
3750: 30 = 1250 (m / min).
Answer. 1250 m / min.