V = velocity
d = distance (or displacement)
t = time
(original equation)
v = d/t
(Given information)
v = 35m/h
d = 15m
(rearrange equation to get)
t = d/v
(substitute numbers in)
t = 15m/35m/h
t = 0.43hours
Therefore, it would take 0.43hours to drive 15 miles at 35 miles per hour
*Hope this helps*