The lifting force exerted by the atmosphere on the wings of an airplane in flight varies directly as the surface area of the wings and
the square of the plane's airspeed. A small private plane has a cruising airspeed of 250 miles per hour. In order to obtain 3 times the
lifting force, a new plane is designed with a wing surface area twice that of the older model. What cruising speed, to the nearest
mile per hour, is planned for the new model?
a 125 mph
C.312 mph
b. 280 mph
d. 306 mph