<h3>Hmm, I think it might be 2 because its just a smaller version of the other triangles but if its wrong then the possible answer is 5 cause 5 looks just like 1 don't ya think?</h3>
The rate that you are walking at is 100 meters per minute. In two kilometres there are 2000 meters. It takes 10 min to walk one kilometre. Therefore the answer is 20 minutes. Just divide 2000 by 100 to get the time