1. ## Mileage

If you drive 832 miles in a period of 21 hrs, and if you use a total of 29 gallons of gasoline on the trip,

a.) Determine the avg. speed in mi/h

I said 832/21 = x/1 => x = 39.6 mi/h

b.) Determine the avg. speed in km/h

I said 1km = 0.625 mi and so 39.6/x = .625mi => x = 63.4 km/h

c.) Determine gas mileage you used in km/L

I said 29/21 = x/1 => x = 1.38 gallons (but this gives you 1 gallon per 1 km)..

2. Can someone confirm if a and b are correct? Looking back at it, I am thinking not because that doesn't give me the average. Should I first do 832/31 to get the avg miles per hour, then convert this to kilometers? I think what I did was make it more harder.

And then for c not sure.

3. Hello,
Originally Posted by DiscreteW
Can someone confirm if a and b are correct? Looking back at it, I am thinking not because that doesn't give me the average. Should I first do 832/31 to get the avg miles per hour, then convert this to kilometers? I think what I did was make it more harder.

And then for c not sure.
No it's ok for a and b. If you calculated b with the exact value of a and not 39.6 (i'm talking in general, not for this exercise in particular)

for c. :
first convert 29 gallons into L (1 gallon = 3,78541178 litres). This gives result m.
and convert 832 mi into km. This gives result n.

Then :
n km --> m L

---> x=n/m

4. ## Miles per Gallon

If I'm getting an average of 600km per 90L tank in my truck, how many miles per gallon am I getting?

5. Originally Posted by Tokes
If I'm getting an average of 600km per 90L tank in my truck, how many miles per gallon am I getting?
convert km to miles and liters to gallons.

btw, start a new problem with a new thread.