Question 102131
well lets see...

May= 1 hour
Leah= 3 hours

It seems that may goes three times faster than Leah but she is 10 km/h faster though... so let's start with a little chart starting from 1 to find out how much they each travel...

Leah__May__Answer
1____3_____No
2____6_____No
3____9_____No
4____12____No
5____15____Yes!

It looks like we found an answer!

May goes 15 km/h 
Leah goes 5 km/h