Question

собственная скорость лодки 4,5 км/ч, скорость течения 2,5 км/ч. Найдите скорость лодки при движении по течению и против течения. Какой путь пройдёт лодка по течению за 4ч и какой путь она пройдёт против течения за 3 ч?

Answer 1

4,5+2,5=7км/ч Скорость лодки по течению

4,5-2,5=2 Против течения

7*4=28 км  За 4 часа по течнию

2*3=6км  За 3 часа против течения

Answer 2

4,5+2,5=7км/ч-по теченія

 7*4=28км пройдет лодка по течению

4,5-2,5=2км/ч против течения

3*2=6км  против течения пройде лодка 

Answer 3

Calculation of Boat's Speed

To find the boat's speed when moving with and against the current, we need to consider the boat's speed and the speed of the current.

Given: - Boat's speed: 4.5 km/h - Speed of the current: 2.5 km/h

To find the boat's speed when moving with the current, we add the boat's speed and the speed of the current: Boat's speed with the current = 4.5 km/h + 2.5 km/h = 7 km/h.

To find the boat's speed when moving against the current, we subtract the speed of the current from the boat's speed: Boat's speed against the current = 4.5 km/h - 2.5 km/h = 2 km/h.

Calculation of Boat's Distance Traveled

To calculate the distance traveled by the boat when moving with and against the current, we need to consider the time and the boat's speed.

Given: - Time for moving with the current: 4 hours - Time for moving against the current: 3 hours

To find the distance traveled by the boat when moving with the current, we multiply the boat's speed with the current by the time: Distance traveled with the current = Boat's speed with the current * Time = 7 km/h * 4 hours = 28 km.

To find the distance traveled by the boat when moving against the current, we multiply the boat's speed against the current by the time: Distance traveled against the current = Boat's speed against the current * Time = 2 km/h * 3 hours = 6 km.

Therefore, the boat will travel a distance of 28 km with the current in 4 hours and a distance of 6 km against the current in 3 hours.