Question 732991
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 time driving is 1/5 hour less than his time bicycling.  How far is his office?
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It's 2x as fast, so 1/5 = time at 30 mi/hr
d = r*t = 30 mi/hr * 1/5 hr = 6 miles