A girl walks five kilometers in 60 minutes at a constant speed. If she continues walking at this speed, how many kilometres will she walk in 120 minutes?
We’re told in the question that the girl walks a distance of five kilometers in a time of 60 minutes. We need to calculate how many kilometres she’ll walk in 120 minutes. The amount of time has doubled as 60 minutes multiplied by two is equal to 120 minutes. As we have multiplied the time by two, we also need to multiply the distance by two. Five kilometers multiplied by two is equal to 10 kilometres.
This means that if the girl continues walking at the same speed, she will walk 10 kilometers in 120 minutes.