None of the choices are equivalent
64/4 is 16
a is 4
b is 4
c is 2
d is 1
An accurate estimate is anywhere from 0.06 to 0.07. The exact answer is 0.06921568627.
If he travels 5/2 miles in 15 mins, then in 1 min he will travel 5/2 ÷ 15 = 1/6 miles and it will take him 15 ÷ 5/2 = 6 mins to travel 1 mile.
