SOLUTION: Suppose you are entered in a driving contest and you are to maintain an average speed of 60 mph for 2 miles. Your engine develops a miss and you can only maintain 30 mph for the fi

Question 312521: Suppose you are entered in a driving contest and you are to maintain an average speed of 60 mph for 2 miles. Your engine develops a miss and you can only maintain 30 mph for the first mile. The miss disappears after the first mile and the engine returns to normal. How fast must you drive the second mile to meet the overall average speed requirement?
Answer by checkley77(12844) (Show Source): You can put this solution on YOUR website!
60*2=120 MILES IS THE DISTANCE.
D=RT
120=30*1+X*1
120=30+X
X=120-30
X=90 MPH IS THE SPEED FOR THE SECOND MILE.
120=[(30+90)/2]2
120=[120/2]2
120=60*2
120=120
RELATED QUESTIONS
Now, suppose you are entered in a driving contest and you are expected to maintain an... (answered by stanbon)

You are entered in a driving contest and you are expected to maintain an average speed of (answered by ptaylor)

expected to maintain an average speed of 60 mph for 2 miles, unfortunately engine... (answered by solver91311)

You 495 miles from home and you are driving toward home at an average of 45mph. How long... (answered by Alan3354)

1. You are a Cadet Platoon Sergeant serving as part of the Chain of Command... (answered by solver91311)

Assume the distance b/w Washington DC and Philadelphia is 120 miles. Suppose on a recent (answered by ankor@dixie-net.com)

On a drive from your home to town, you wish to average 33.6 mph. The distance from your (answered by mananth)

if you are traveling 330 miles and going 60 mph one way and comming back you are going 40 (answered by Fombitz)

you and a friend take turns driving on a 450 mile trip. Your friend drives for 3.5 hours (answered by graphmatics)