SOLUTION: Word Problem One - An old car has to travels a 2-mile route, uphill and down. Because it is so old, the car can climb the first mile - the ascent - no faster than an average speed

Algebra.Com
Question 230893: Word Problem One - An old car has to travels a 2-mile route, uphill and down. Because it is so old, the car can climb the first mile - the ascent - no faster than an average speed of 20 mph. How fast does the car have to travel the second mile - on the descent it can go faster, of course - in order to achieve an average speed of 30 mph for the trip? (Show a complete algebraic solution for the problem and check the answer.)
The teacher said set up a table
Trip DISTANCE = SPEED x TIME
UP
DOWN
TOTAL
I am confused as to when to put in x and how to make an equation!

Answer by rfer(16322)   (Show Source): You can put this solution on YOUR website!
do an average
30=(20+x)/2
60=20+x
60-20=40 mph
your teacher might be looking for something diferent,
but this works

RELATED QUESTIONS

An old car has to travel a 2-mile route, uphill and down. Because it is so old, the car... (answered by Alan3354)
An old car has to travel a 2-mile route, uphill and down. Because it is so old, the car... (answered by ankor@dixie-net.com)
an old care has to travel a 2 mile route,up hill and down.The car can climb the first... (answered by Paul)
A car travels a 1 mile track at an average speed of 30 miles per hour. At what average... (answered by nerdybill)
Hi. My name is Allen and I usually have issues with these word problems. Could you please (answered by MathLover1)
car 1 quickly accelerates to aprox 75mph, stays there then slows down to a stop at 3.5... (answered by ikleyn)
Car A starts in Sacramento at 11am. It travels along a 400 mile route to Los Angeles at... (answered by ikleyn,mccravyedwin,greenestamps)
Car A starts in Sacramento at 11am. It travels along 400 mile route to LA at 50mph. Car B (answered by palanisamy)
Im having trouble with this word problem and don't know how to put it together please... (answered by richwmiller,dkppathak)