<PRE><B>Question 363893</B>
If Dr. Suzuki rides his bike to his office, he averages 15 miles per hour. 
If he drives his car, he averages 30 miles per hour. His driving is 1/5 hour less than his time bicycling. How far is his office? 
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bike DATA:
rate = 15 mph ; distance = x miles ; time = d/r = x/15 hrs.
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car DATA:
rate = 30 mph ; distance = x miles ; time = x/30 hrs.
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Equations:
bike time - car time = 1/5 hr
x/15 - x/30 = 1/5
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2x - x = 6
x = 6 miles (distance to the office)
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Cheers,
Stan H.</PRE>