+244 Suppose you're driving to the city at a constant speed of 75 mi/h for 50 miles. Then construction slows you to a pokey rate of 45 mi/h for the remainder of the trip. You arrive after driving 2 hours and 15 minutes. How far do you live from the city? A. 180 mi B.120 mi C.200 mi D.71 mi 71 mi
Suppose you're driving to the city at a constant speed of 75 mi/h for 50 miles. Then construction slows you to a pokey rate of 45 mi/h for the remainder of the trip. You arrive after driving 2 hours and 15 minutes. How far do you live from the city? A. 180 mi B.120 mi C.200 mi D.71 mi 71 mi.
You can cover the first 50 miles in: 50/75 x 60 =40 minutes.
Since total time taken to drive is 2 hours and 15 minutes=135 minutes, then
135 - 40=95 minutes or 1 hours and 35 minutes that you were driving @ 45mph, therefore:
95/60 x 45 =71.25 miles that you drove @ 45 mph, therefore:
71.25 + 50 =121.25 miles-That is how far you live from the city, or "B" roughly!.
