Question

A runner has two pairs of running shoes. To find out which pair will allow her to run faster, she puts on the first pair and runs around the track once in exactly 2 minutes. She puts on the second pair and runs around the track again, this time, making it in 2 minutes and 10 seconds. She decides the first pair is better, and heads to the store to return the second pair.

Answer 1

so the first pair of shoe is a good one.