Why do this problem?
could be used when distance and speed are being discussed or revised. There are several possible approaches to the problem so it could be useful for stimulating discussion. If learners work in pairs on the problem they are then able to talk through their ideas with a partner.
What is the speed of the tortoise? So what is the speed of the hare?
If the hare had not stopped, how long before the tortoise would it have arrived?
Learners could make a graph of the race for the two animals.
Suggest finding out the speed of the tortoise which is a good starting point. (The speed is the number of kilometres in an hour that is travelled.)