1. Tony cycles from his home to a country park near the town where he lives.

He cycles at an average speed of 12 mph for the first 2 hours of his journey.

He then has 24 miles left to go to get to the country park.
He cycles these 24 miles at an average speed of 8 mph.

Tony says,

"My average speed from my home to the country park was 10 mph."

Is Tony right?
You must show how you get your answer.