Question

Пароход проплыл по течению реки 108 км. за 9 ч. за какое время он пройдет обратный путь, если его скорость уменьшиться на 3 км.в час?

Answer 1

1)108:9=12(км/ч)
2)12-3=9(км/ч)
3)108:9=12(часов)
Ответ : За 12 часов

Answer 2

Calculation of the Return Journey Time

To calculate the time it will take for the steamboat to travel the return journey, we need to consider the initial speed and the reduced speed.

Given that the steamboat traveled 108 km in 9 hours, we can calculate its initial speed using the formula:

Speed = Distance / Time

Initial speed = 108 km / 9 hours = 12 km/h.

If the speed is reduced by 3 km/h, the new speed will be 12 km/h - 3 km/h = 9 km/h.

To calculate the time it will take for the steamboat to travel the return journey, we can use the formula:

Time = Distance / Speed

Return journey time = 108 km / 9 km/h = 12 hours.

Therefore, it will take the steamboat 12 hours to complete the return journey at a reduced speed of 9 km/h.