Answer:
Height of the building = 11.4 m
Explanation:
As we know that the stone is projected at an angle 46 degree with speed 8.65 m/s
so the two components of the speed is given as
vertical component of the speed is given as
now we know that the ball strike at horizontal distance of 13.7 m
so we will have
now we know that in vertical direction ball will move under uniform gravity so we can use kinematics
Height of the building = 11.4 m