A boy on level ground watches a hot air balloon launched

Last updated: 6/10/2023

A boy on level ground watches a hot air balloon launched from a point 18 0 m away from him The balloon rises with constant speed 0 314 m s Find the rate at which the angle of elevation of the balloon at his eye is changing when the angle becomes 60 0 degrees A 2 0 degree sec C 0 25 degree sec B 1 0 degree sec D 0 15 degree sec