Question

Из города выехал мотоцикл, через 1 ч в том же направлении выехал грузовик. скорость мотоцикла 80 км/ч. через 3 ч после отправления мотоцикла оказалось, что он опережает грузовик на 100 км. найдите скорость грузовика. ОЧЕНЬ ПРОШУ ПОМОЧЬ! ЗАРАНЕЕ СПАСИБО!

Answer 1

80*3=240 км проехал мотоцикл
3-1=2 часа был в пути грузовик
240-100=140 км проехал грузовик
140:2=70 км/час скорость грузовика

Answer 2

Finding the Speed of the Truck

To find the speed of the truck, we can use the concept of relative speed. When the motorcycle and the truck meet, they would have traveled the same distance. Let's calculate the distance traveled by each vehicle and then find the speed of the truck.

Calculations

The motorcycle travels for 3 hours at a speed of 80 km/h, so the distance it covers is: Distance covered by motorcycle = Speed * Time = 80 km/h * 3 h = 240 km

When the motorcycle meets the truck, it has covered 100 km more than the truck. Therefore, the distance covered by the truck is: Distance covered by truck = Distance covered by motorcycle - 100 km = 240 km - 100 km = 140 km

Now, we can find the speed of the truck using the distance covered and the time taken: Speed of the truck = Distance / Time = 140 km / 1 h = 140 km/h

So, the speed of the truck is 140 km/h.

I hope this helps! If you have any other questions, feel free to ask.