JEE Main 201912 Apr, Evening shiftMathematicsMediumHeight and Distance38× since 2004
The angle of elevation of the top of a vertical tower standing on a horizontal plane is observed to be 45^o from
a point A on the plane. Let B be the point 30 m vertically above the point A. If the angle of elevation of the
top of the tower from B be 30^o, then the distance (in m) of the foot of the tower from the point A is :