Copyright © University of Cambridge. All rights reserved.

'Round Trip' printed from

Show menu

I walk to the bike shop at 3 miles per hour, and I cycle home at 12 miles per hour. What is my average speed, in miles per hour, for the time that I am actually on the route?
If you liked this problem, here is an NRICH task which challenges you to use similar mathematical ideas.  

See all short problems arranged by curriculum topic in the short problems collection
This problem is taken from the UKMT Mathematical Challenges.