Including reaction time, the stopping distance is more than 20 feet at 10 miles per hour, at 20 miles per hour

Question

Question: Including reaction time, the stopping distance is more than 20 feet at 10 miles per hour, at 20 miles per hour it will be:

Options:

1.  30 feet
2.  40 feet
3.  63 feet
4.  75 feet

Answer 1

3.)  63 feet

Including reaction time, the stopping distance is more than 20 feet at 10 miles per hour, at 20 miles per hour it will be 63 feet.