Question

Скорость грузовика -40км/ч, легкового автомобиля --на 80км/ч больше. Во сколько раз быстрее грузовика пройдет легковой автомобиль расстояние в 240 км?

Answer 1

1) 40+80=120 км/ч - скорость автомобиля
2) 240:40=6 ч - проедет 240 км. грузовик
3) 240:120=2 ч - проедет 240 км легковой автом-ль
4) 6:2=3 раза - автомобиль быстрее

Answer 2

Calculation of Speed Difference

To calculate how much faster the car will travel compared to the truck, we need to find the speed difference between the two vehicles.

Given: - Speed of the truck: -40 km/h (negative sign indicates the direction of motion) - Speed of the car: 80 km/h more than the truck

To find the speed of the car, we add 80 km/h to the speed of the truck: - Speed of the car = -40 km/h + 80 km/h = 40 km/h

Therefore, the car is traveling at a speed of 40 km/h.

Calculation of Time Difference

To determine how many times faster the car will complete a distance of 240 km compared to the truck, we need to calculate the time taken by each vehicle.

The formula to calculate time is: Time = Distance / Speed

For the truck: - Distance = 240 km - Speed = -40 km/h

Using the formula, we can calculate the time taken by the truck: Time taken by the truck = 240 km / (-40 km/h) = -6 hours

For the car: - Distance = 240 km - Speed = 40 km/h

Using the formula, we can calculate the time taken by the car: Time taken by the car = 240 km / 40 km/h = 6 hours

Calculation of Speed Ratio

To find the ratio of the car's speed to the truck's speed, we divide the car's speed by the truck's speed.

Car's speed = 40 km/h Truck's speed = -40 km/h

Speed ratio = Car's speed / Truck's speed = 40 km/h / (-40 km/h) = -1

Therefore, the car will complete the distance 240 km in the same amount of time as the truck, but in the opposite direction. The car is not faster than the truck; it is traveling at the same speed but in the opposite direction.

Please note that the negative sign in the speed indicates the direction of motion, not the speed itself.