SOLUTION: if i drove my car 45 miles and ran out of gas. then i walked 3 miles to a gas station. my driving speed was 15 times my walking speed. if my total time for the drive and walk wa

Question 919410: if i drove my car 45 miles and ran out of gas. then i walked 3 miles to a gas station. my driving speed was 15 times my walking speed. if my total time for the drive and walk was 1.5 hours, what was my driving speed
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
if i drove my car 45 miles and ran out of gas. then i walked 3 miles to a gas station.
my driving speed was 15 times my walking speed.
if my total time for the drive and walk was 1.5 hours, what was my driving speed?
:
let w = your walking speed
then
15w = your driving speed
:
Write a time equation; time = dist/speed
:
drive time + walk time = 1.5 hrs
+ = 1.5
reduce the 1st fraction
+ = 1.5
= 1.5
w = 6/1.5
w = 4 mph is your walking speed
then obviously,
15(4) = 60 mph is your driving speed
:
:
Confirm this find the actual time driving and walking
45/60 = .75 hr
3/4 = .75 hr
-----------------
total time 1.5 hrs

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