Question

Расстояние между двумя причалами 36 км.сколько времени потратит катер на пути от одного причала до другово и обратно,если его собственная скорость 15 км\ч .а скорость реки 3 км\ч

Answer 1

36:(15+3)=2 (часа)-времени потратит катер на пути от одного причала до другого.
36:(15-3)=3 (часа)-времени потратит катер на обратном пути.
2+3=5 (часов)-времени потратит катер на путь туда и обратно.
Ответ: 5 часов.

Answer 2

Calculating Time for the Boat Journey

To calculate the time the boat will spend on the journey, we can use the formula: time = distance / speed.

Given: - Distance between the piers = 36 km - Boat's speed = 15 km/h - River's speed = 3 km/h

Time to Reach the Other Pier

The boat's speed relative to the water is the difference between its speed and the river's speed, which is 15 km/h - 3 km/h = 12 km/h.

Using the formula, the time it will take the boat to reach the other pier is: time = distance / speed, time = 36 km / 12 km/h = 3 hours.

Time for the Return Journey

For the return journey, the boat's speed relative to the water is the sum of its speed and the river's speed, which is 15 km/h + 3 km/h = 18 km/h.

Using the same formula, the time it will take the boat to return to the initial pier is: time = distance / speed, time = 36 km / 18 km/h = 2 hours.

Total Time for the Round Trip

To find the total time for the round trip, we add the time for the journey to the other pier and the time for the return journey: Total time = 3 hours + 2 hours = 5 hours.

So, the boat will spend a total of 5 hours on the round trip.