A hot-air balloon rises vertically at from a point on level ground
MATHEMATICS · Subjective · CBSE · Mathematics · Applications of Derivatives · Applications of Derivatives
Problem
A hot-air balloon rises vertically at 4 m/s from a point on level ground. An observer stands 50 m from that point. Determine the rate at which the observer’s angle of elevation θ is changing when the balloon is 30 m above the ground. Express your answer in radians per second.