Taro runs 100m in 12 seconds and Jiro runs in 15 seconds.
Taro and Jiro ran 100m race.
When Taro did a goal, how many meters behind Taro did Jiro run?
Answer
20 m
Solution
Because Jiro takes 15 seconds to run 100 m, he runs 100 / 15 × 12 = 80 m in 12 seconds.
Therefore it's 100 - 80 = 20 m until a goal.
