SOLUTION: My question involves a word problem:
A certain car that is being tested by its manufacturer uses it entire fuel supply in about 38 hours when idling. The same car, when driven a
Algebra.Com
Question 106987: My question involves a word problem:
A certain car that is being tested by its manufacturer uses it entire fuel supply in about 38 hours when idling. The same car, when driven at 60 miles per hour on a test track, uses about three-and-a- half times as much fuel per hour as it does when idling. If the engine has been idling for 10 hours and the car is then run at 60 miles per hour, how much longer will the car run before it uses up all of its fuel?
I think it is 38 - 10 = 28 divided by 3.5 = 8 hours.
I just don't know the exact steps to follow to get the correct answer.
Could you please help....
Thank you...
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
I get the same answer
What's the rate of using fuel when idling?
(1 tank) / 38 hours
Whats the rate of using fuel at 60 mph?
(3.5 tanks) / 38 hours
Now to use up 1 tankful,
(idle rate*idle time) + (run rate*run time) = 1 tank
{1 tank/38 hours)*10 hours + (3.5 tanks/38 hours)*(run time) = 1 tank
answer
RELATED QUESTIONS
A certain car that is being tested by its manufacturer uses its entire fuel supply in... (answered by mananth)
1. –/2 points Notes
Problem 7-22 A food-packaging apparatus underfills 20% of the... (answered by solver91311)
a transport company purchases tyres from a certain manufacturer.From each tyre a life of... (answered by Boreal)
A manufacturer makes mobile phones. The manufacturer employs an inspector to check the... (answered by stanbon)
Hy my question involves the supply function involving roots.am given the quantity... (answered by Fombitz)
the fuel consumption of a car is reported in liters per 100 km ( L/100km )
a)
which of... (answered by josmiceli)
Can you please explain to me how to calculate Fahrenheit in a word problem. I have looked (answered by stanbon)
My worksheet is about logarithm. The problem is a word problem. " A lab assistant tested... (answered by stanbon)
In the study of fingerprints, an important quantitative characteristic is the total ridge (answered by Boreal)