Question

Скорость лодки в стоячей воде равна 29 км/ч, а скорость течения реки 3 км/ч. Какое расстояние проплыла лодка за 3 часа по течению реки и 4 часа против течения.

Answer 1

Sпо течению = (Vсобственная + Vтечения) • t
Sпо течению = (29 + 3)• 3 = 32•3 = 96 км

Sпротив теч = (Vсобств - Vтечения)•t
Sпротив теч = (29 - 3) • 4 = 26 • 4 = 104 км

Answer 2

Calculation of the Distance Traveled by the Boat

To calculate the distance traveled by the boat, we need to consider the speed of the boat in still water and the speed of the river current.

Given: - Speed of the boat in still water: 29 km/h - Speed of the river current: 3 km/h - Time spent traveling with the current: 3 hours - Time spent traveling against the current: 4 hours

To calculate the distance traveled with the current, we can use the formula: distance = speed × time.

Let's calculate the distance traveled with the current first:

Distance traveled with the current = (Speed of the boat in still water + Speed of the river current) × Time spent traveling with the current

Distance traveled with the current = (29 km/h + 3 km/h) × 3 hours

Distance traveled with the current = 32 km/h × 3 hours

Distance traveled with the current = 96 km

Now, let's calculate the distance traveled against the current:

Distance traveled against the current = (Speed of the boat in still water - Speed of the river current) × Time spent traveling against the current

Distance traveled against the current = (29 km/h - 3 km/h) × 4 hours

Distance traveled against the current = 26 km/h × 4 hours

Distance traveled against the current = 104 km

Therefore, the boat traveled a distance of 96 km with the current and a distance of 104 km against the current.

Please note that these calculations assume a constant speed and direction of the river current throughout the entire journey.