Question

катер курсирует по реке между двумя городами,расстояние между которыми 63км.Собственная скорость катера 15км/ч,а скорость течения-6км/ч.Какое время затратит катер на один рейс туда и обратно.

Answer 1

63:(15+6)=3 часа по течению
63:(15-6)=7 часов против течения
3+7=10 часов

Answer 2

1) 15+6=21 (км/ч) - скорость по течению реки
2) 63:21=3 (ч) - на путь по течению реки
3) 15-6=9 (км/ч) - скорость против течения
4) 63:9=7 (ч) - на путь против течения
5) 3+7=10 (ч) - на рейс

Answer 3

Calculation of Time for a Round Trip

To calculate the time it will take for the boat to complete a round trip between the two cities, we need to consider the boat's speed and the speed of the current.

Given: - Distance between the two cities: 63 km - Boat's speed: 15 km/h - Speed of the current: 6 km/h

To calculate the time for the boat to travel from one city to the other, we can use the formula:

Time = Distance / (Boat's Speed + Speed of the Current)

Let's calculate the time for one leg of the trip (from one city to the other) using the given values:

Time = 63 km / (15 km/h + 6 km/h)

Simplifying the equation:

Time = 63 km / 21 km/h

Calculating the result:

Time = 3 hours

Therefore, it will take the boat approximately 3 hours to travel from one city to the other.

Since the boat needs to make a round trip, we need to double the time:

Total Time = 2 * 3 hours

Calculating the result:

Total Time = 6 hours

Therefore, the boat will take approximately 6 hours to complete a round trip between the two cities.

Please note that the above calculations are based on the given information and assume a constant speed throughout the journey.