It will take you exactly 25.71 min to drive 15 miles at 35miles/hour (without any stop or deceleration which by the way isunrealistic). To get the answer please do[15miles/(35miles/1hour)]. The miles at the numerator will cancelout the miles at the denominator which leaves you with hour(s) asunit describing your answer. You would then multiply the ratio thatyou get by 60 minutes to get the 25.71 minutes.Ben from Cleveland, OH