Question 901126
an airplane climbed at an average vertical speed of 300 feet per minute and descended immediately at an average speed of 25 miles per hour. The flight was performed in 25 minutes. What altitude did the plane reach?
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25 mi/hr = 25*22*60/15 ft/min = 2200 ft/sec
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Avg speed of the round trip = 2*300*2200/(300+2200) = 528 ft/min
RT distance = 25*528 = 13200 feet
Altitude = 6600 feet