The distance between the marinas is 90 km. From each of them two motor ships left at the same time towards each other.
| May 10, 2021 | education
The distance between the marinas is 90 km. From each of them two motor ships left at the same time towards each other. How many hours would they need what would they need to meet if the speed of the first is 20 km / h and the second is 25 km / h?
1) What is the speed of the approach of the motor ships, if it is known from the condition of the problem that two motor ships simultaneously left each of the quays towards each other and the speed of the first is 20 km / h, and the second is 25 km / h?
20 + 25 = 45 (km / h).
2) How many hours will it take for them to meet if the distance between the marinas is 90 km?
90: 45 = 2 (hours).
Answer: the ships will need 2 hours to meet.
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