Problema Solution
an elevator takes 60 seconds to rise 500 feet. What's the average speed in miles per hour? (1 mile = 5280 feet)
Answer provided by our tutors
1 mile = 5280 feet
1 ft = 1/5280 miles
the average speed = distance/time
time = 60 sec = 1 min = 1/60 hr
distance = 500 ft = 500(1/5280) mi
avg.speed = (500(1/5280))/(1/60)
avg.speed = 5.68 miles per hour
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