Question

Собственная скорость катера 18 км/ч,скорость течения реки 2км/ч. Какое расстояние проплывёт катер за 2ч по течению реки? За 3ч против течения реки?

Answer 1

1) 18-2= 16
2) 18+2=20
3) 20*2= 40 (км)
4) 16*3= 48 (км)
Ответ: по теч. - 40; пр т - 48

Answer 2

1) 18+2=20(км\ч) - скорость по течению
2) 18-2=16(км/ч)-скорость против течения
3) 2*20=40(км) - расстояние по течению
4)16*3= 48(км)- расстояние против течения
Ответ: 40 км , 48 км.

Answer 3

Calculation of Distance Traveled

To calculate the distance traveled by the boat in different scenarios, we need to consider the boat's speed and the speed of the river current.

Given: - Boat speed: 18 km/h - River current speed: 2 km/h

Distance Traveled in 2 Hours with the River Current:

When the boat is moving with the river current, its effective speed is the sum of its own speed and the speed of the river current. Therefore, the effective speed is 18 km/h + 2 km/h = 20 km/h.

To calculate the distance traveled in 2 hours, we can multiply the effective speed by the time: Distance = Speed × Time = 20 km/h × 2 h = 40 km.

Therefore, the boat will travel a distance of 40 km in 2 hours with the river current.

Distance Traveled in 3 Hours against the River Current:

When the boat is moving against the river current, its effective speed is the difference between its own speed and the speed of the river current. Therefore, the effective speed is 18 km/h - 2 km/h = 16 km/h.

To calculate the distance traveled in 3 hours, we can multiply the effective speed by the time: Distance = Speed × Time = 16 km/h × 3 h = 48 km.

Therefore, the boat will travel a distance of 48 km in 3 hours against the river current.

Please note that these calculations assume a constant speed and no other factors affecting the boat's movement.