Question 810521: Daniel leaves school and runs 5 miles to his friend's house where he had left his bike the previous day. After picking up his bike, he then rides a distance of 2 miles to his home. His running speed is 3 mph slower than his biking speed. His total running and biking time is 2 hours. What is Daniel's biking speed?
Answer by richwmiller(17219)   (Show Source):
You can put this solution on YOUR website! x+y=2,
r=b-3,
5/r=x,
2/b=y
b=bike speed = 6, y= bike time= 1/3 check 6*1/3=2 miles
r=running speed = 3, x=running time= 5/3, check 5/3*3=5 miles
check 1/3+5/3=6/3=2 hours
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