Helicopter Life
Helicopter Life
What is the horizontal distance in feet from the helicopter to the raft?
A helicopter pilot sites a liferaft. The angle of depression to the raft is 21 degrees, and altitude of the helicopter is 0.8 miles. PLUS If the helicopter flies at a constant speed of 125 km / h, How long will, in minutes, before it is directly above the raft? Assume that the altitude of the helicopter does not change.
That flight distance xm, and time t min. Then: 0.8 mi = 0.8 * 5,280 feet 125 miles / H = 125 * 5280 / 60 m / min. 0.8 * 5280 / x = tan (21) x = 0.8 * 5280 / Tan (21) = 11.004 feet t = 60x / (125 * 5280) = 1.00 min.
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