Try Again!

Change the height of the hill to see how it effects the speed of the fire.

In this example, the fire is travelling at 5kmph on flat ground.

The slope of the hill has increased by 10° doubling the speed of the fire to 10kmph.

The slope of the hill has increased by 20° doubling the speed of the fire to 20kmph.

The slope of the hill has increased by 30° doubling the speed of the fire to 40kmph.

The slope of the hill has increased by 40° doubling the speed of the fire to 80kmph.

As the fire travels downhill, its speed will decrease roughly by half.