Question

A plane is headed due south with an airspeed of 190 mph. A wind from the direction of S 40 degrees W is blowing at 30 mph. Find the groundspeed of the plane, rounded to the nearest whole number

s = speed south = 190 - 30 cos 40

w = speed west = 30 sin 40

speed magnitude = sqrt (s^2 + w^2)

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