Question

Двигаясь по течению реки, расстояние в 108 км моторная лодка проходит за 2 ч, а плот за — 27 ч. Вычисли скорость моторной лодки при движении против течения реки.

Answer 1

108:27 = 4км/ч скорость реки.
108-(4*2)=50 км/ч скорость моторной лодки.
50-4=46 км/ч - скорость моторной лодки при движении против течения реки
ответ: 46км/ч

Answer 2

1) 108: 2 = 54 (км ч) - скорость лодки по течению реки
2) 108: 27 = 4 (км ч) - скорость реки
3) 54 -( 4+4) =46(км ч)

Ответ: скорость моторной лодки против течения - 46 км ч

Answer 3

Calculation of the Speed of the Motorboat

To calculate the speed of the motorboat when moving against the current of the river, we need to use the formula:

Speed = Distance / Time

Given that the motorboat travels a distance of 108 km in 2 hours when moving with the current, we can calculate its speed:

Speed with the current = 108 km / 2 hours = 54 km/h.

To calculate the speed of the motorboat when moving against the current, we need to find the time it takes for the motorboat to cover the same distance of 108 km.

Given that the raft takes 27 hours to cover the same distance, we can calculate the speed of the raft:

Speed of the raft = 108 km / 27 hours = 4 km/h.

To find the speed of the motorboat when moving against the current, we subtract the speed of the raft from the speed of the motorboat when moving with the current:

Speed against the current = Speed with the current - Speed of the raft = 54 km/h - 4 km/h = 50 km/h.

Therefore, the speed of the motorboat when moving against the current of the river is 50 km/h.