Question

James rides his bicycle every Sunday morning. First, he pedals uphill at a speed of 4 miles per hour. Then he rides downhill at a speed of 6 miles per hour. He covers a distance of 18 miles in 4 hours.
For how many miles does he travel downhill?
What is the difference in time spent pedalling uphill vs pedalling downhill?

Answer 1

6 miles downhill for 1 hour.
12 miles uphill for 3 hours.

The difference is times 2.