Practice Set - 21
Q1. A
Q2. C
A boy standing on top of a building, 50 m in height, sees a layer of fog above him at a height of 70m. he throws a stone into the fog. The stone follows a path given by the equation y= - x2 + 40x – 271 with the base of the building as the X-axis. Find the distance between the points at which the stone enters the fog and the point at which it comes out the fog
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