Question

Расстояние между двумя городами расположенными на берегах одной и той же реки равно 720 км теплоход двигаясь по течению преодолевает это расстояние За 36 часов двигаясь против течения за 45 часов Найдите собственную скорость теплохода

Answer 1

720:36=20км- за 1 час

Answer 2

Calculating the Speed of the Boat

To calculate the speed of the boat, we can use the formula:

Speed of the boat = (Downstream speed + Upstream speed) / 2

Where: - Downstream speed = Distance / Time taken downstream - Upstream speed = Distance / Time taken upstream

Given: - Distance = 720 km - Time downstream = 36 hours - Time upstream = 45 hours

Using the given values, we can calculate the speed of the boat.

Downstream speed: - Distance = 720 km - Time taken downstream = 36 hours - Downstream speed = 720 km / 36 hours = 20 km/h Upstream speed: - Distance = 720 km - Time taken upstream = 45 hours - Upstream speed = 720 km / 45 hours = 16 km/h Now, we can calculate the speed of the boat using the formula mentioned above.

Speed of the boat: - (20 km/h + 16 km/h) / 2 = 36 km/h / 2 = 18 km/h

Therefore, the speed of the boat is 18 km/h.