Question

The Indianapolis 500 is one of the most exciting events in sports. Each spring, 33 drivers compete in the 500-mile race, sometimes hitting speeds of more than 220 miles an hour. The general formula for computing distance is rate (or speed) multiplied by time, given a steady average speed. The formula may be written d = rt. Answer today's project questions on speed, distance, and time.

(theres more to the problem read further)

Answer 1

An auto race consists of 8 laps. A driver completes the first 3 laps at an average speed of 185 miles/hour and the remaining laps at an average speed of 200 miles/hour. If d represents the length of one lap, which expression represents the time in hours, t, that it takes the driver to complete the race?

Answer 2

i got 3d/185 + 5d/200 = t

Answer 3

The driver's average speed to complete all 8 laps is ______ miles per hour. Round to the nearest tenth of a mile per hour. (Enter only the number.)

Answer 4

@myininaya

Answer 5

@amistre64

Answer 6

delete useless information ...

The formula may be written d = rt.

Answer today's project questions on speed, distance, and time.

An auto race consists of 8 laps.

A driver completes the first 3 laps at an average speed of 185 miles/hour
and the remaining laps at an average speed of 200 miles/hour.

If d represents the length of one lap, which expression represents the time in hours, t, that it takes the driver to complete the race?

3d miles * 1 hr/185 miles
+
5d miles * 1 hr/200 miles

Answer 7

t = 61d/1480 hours

since d = rt, then d/t = r

Answer 8

d/t = 1480/61 right?