Question

Человек ехал 3 часа на велосипеде со скоростью 20 км/ч , а потом некоторое время на мотоцикле со скоростью 60 км/ч средняя скорость 48 км/ч Сколько времени он ехал на мотоцикле ?

Answer 1

23 часа человек проехал на мотоцикле

Answer 2

Ответ 2 часа на мотоцикле

Answer 3

Calculation of Time Spent on Motorcycle

To calculate the time spent on the motorcycle, we need to determine the distance traveled on the motorcycle and divide it by the speed of the motorcycle.

Given information: - Time spent on the bicycle: 3 hours - Bicycle speed: 20 km/h - Average speed: 48 km/h - Motorcycle speed: 60 km/h

To find the distance traveled on the bicycle, we can use the formula: distance = speed * time.

The distance traveled on the bicycle is: 20 km/h * 3 hours = 60 km.

To find the distance traveled on the motorcycle, we can use the formula: distance = speed * time.

Let's assume the time spent on the motorcycle is 't' hours.

The distance traveled on the motorcycle is: 60 km + 60 km/h * t hours.

Since the average speed is given as 48 km/h, we can use the formula: average speed = total distance / total time.

Substituting the values, we get: 48 km/h = (60 km + 60 km/h * t hours) / (3 hours + t hours).

Simplifying the equation, we get: 48 km/h * (3 hours + t hours) = 60 km + 60 km/h * t hours.

Expanding the equation, we get: 144 km + 48 km/h * t hours = 60 km + 60 km/h * t hours.

Rearranging the equation, we get: 48 km/h * t hours - 60 km/h * t hours = 60 km - 144 km.

Simplifying the equation, we get: -12 km/h * t hours = -84 km.

Dividing both sides of the equation by -12 km/h, we get: t hours = 7 hours.

Therefore, the person spent 7 hours on the motorcycle.