SOLUTION: Blaise rode hi bike to him friend elroy's house, which was 15 miles away. After he had been riding for half an hour, he got a flat tire. He walked his bike the rest of the way. The

Question 880116: Blaise rode hi bike to him friend elroy's house, which was 15 miles away. After he had been riding for half an hour, he got a flat tire. He walked his bike the rest of the way. The total trip took him 3 hours. if his walking rate was one-fourth as fast as his riding rate, how fast did he ride?
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
Blaise rode hi bike to him friend elroy's house, which was 15 miles away.
After he had been riding for half an hour, he got a flat tire.
He walked his bike the rest of the way.
The total trip took him 3 hours.
if his walking rate was one-fourth as fast as his riding rate, how fast did he ride?
:
let w = his walking speed
then
4w = his riding speed
:
From the information given we know that he rode for .5 hrs, therefore:
He walked 2.5 hrs
:
Write a distance equation; dist = time * speed
walk dist + ride dist = 15 mi
2.5w + .5(4w) = 15
2.5w + 2w = 15
4.5w = 15
w = 15/4.5
w = 3 mph his walking speed
then
3.333 * 4 = 13 mph, his riding speed
:
:
Check this out, find how far he biked and how far he walked
.5 * 13.333 = 6.67 mi
2.5 * 3.333 = 8.33 mi
---------------------
total dist: 15.00 mi

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