if a car is going to travel 2 miles and finishes the 1st mile in 12 minutes, how fast does the car have to go the 2nd mile to average 60 miles per hour?
2006-10-25 12:26:48 · 5 answers · asked by handyman5218 3 in Science & Mathematics ➔ Physics
sorry i did not proof before i submitted question. the first mile was supposed to take 2 minutes not 12. hope that did not confuse anyone. the first two answers are correct. 60 mph = 1 mile per minute. 2 miles = 2 minutes. first mile took 2 minutes therefore not possible to average 60 mph over total distance.
2006-10-25 18:30:59 · update #1
Hi. At 60 MPH an object travels 1 mile per minute. If it averages 60 MPH the distance to cover 2 miles can not exceed 2 minutes. The car would have to exceed 'c', which is ,as far as we know, impossible.
2006-10-25 12:32:17 · answer #1 · answered by Cirric 7 · 1⤊ 0⤋
If the first mile is completed in 12 minutes, that would equal a speed of 5 miles per hour. So over the second mile you would have to go 115 m/h. Because 5 + 115 = 120 120 / 2 = 60
2006-10-25 19:34:54 · answer #2 · answered by chris_gonelli 1 · 0⤊ 1⤋
Can't be done. To average 60 miles an hour, you'd need to travel two miles in two minutes, but 12 minutes have already passed
2006-10-25 19:32:17 · answer #3 · answered by Robert K 1 · 1⤊ 0⤋
115 mph
first lap 12min.
60/12 = 5 mph
you'll need to get the average of 2 laps at 60 mph
60*2=120
5 + x = 120
x=115
so... 5 + 115 + 120
the average of 5 mph and 115 mph is 60 mph
i think this is the right answer hope so good luck
2006-10-25 21:02:12 · answer #4 · answered by rjl2382 2 · 0⤊ 1⤋
First mile the avarage speed was 5MPH. Now you have 1 more mile to go and you want to avarage 60MPH. If you went 115 MPH your speed would be 60MPH.
Let me know if I am wrong. Why does it have to reach C ?
2006-10-25 20:00:41 · answer #5 · answered by candyqt2006 1 · 0⤊ 1⤋