SOLUTION: You drove for 1 hour at 50 mph with what average speed would you have to drive for the next 3/4 of an hour for your average for the whole trip to be 56 mph
Algebra.Com
Question 835436: You drove for 1 hour at 50 mph with what average speed would you have to drive for the next 3/4 of an hour for your average for the whole trip to be 56 mph
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
You drove for 1 hour at 50 mph with what average speed would you have to drive for the next 3/4 of an hour for your average for the whole trip to be 56 mph
-----
average = total distance/total time
----------
56 = (1*50 + (3/4)r)/(1+(3/4))
-----
56 = (50 + (3/4)r)/(7/4)
------
50 + (3/4)r) = (7/4)56 = 98
------
(3/4)r = 48
------
r = (4/3)(48)
r = 64 mph
=================
Cheers,
Stan H.
==================
RELATED QUESTIONS
You drive at an average speed of 50 mph for one hour, but the magnitude of your average... (answered by josmiceli)
if you drive for 3 hours at an average speed of 50 miles per hour how far have you... (answered by solver91311,lenny460)
It would be greatly appreciated if you are able to help me with:
Johnathan drove to... (answered by rfer,stanbon)
you drive for 3 hours at an average speed of 50 miles per hour. how far do you... (answered by rfer)
one day you drove to school at an average speed of 20 miles per hour later the day you... (answered by nyc_function)
I need help solving this problem. It is 11:00 am when you leave point A. You stop for a... (answered by josmiceli)
In traveling from city A to city B, John drove for 1 hour at 50 mph and for 3 hours at 60 (answered by rfer,stanbon)
Angela drove 100 miles to Batonsville at an average speed of 50 mph. She then increased... (answered by stanbon)
Traveling at an average speed of 60 miles per hour can give better gas mileage than... (answered by scott8148)