<PRE><B>Question 498563</B>
Laura Dawson can get to school in 1/4 hour if she rides her bike. 

It takes her 3/4 hr. if she walks. 

Her speed when walking is 6 miles per hour slower than her speed when riding.
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Walking DATA:
time = 3/4 hr ; speed = r mph ; distance = (3/4)r miles
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Riding DATA:
time = 1/4 hr ; speed = r+6 mph ; distance = (1/4)(r+6)
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Equation:
distance = distance
(3/4)r = (1/4)(r+6)
3r = r+6
2r = 6
r = 3 mph (walking speed)

What is her speed when riding?
r+6 = 9 mph (riding speed)
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Cheers,
Stan H.
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