An aeroplane when flying at a height of 3125 m from the ground passes vertically below another plane at an instant when the angle of elevation of the two planes from the same point on the ground is 30° and 60° respectively. The distance between the two planes at that instant is
Answer with explanationAnswer: Option A
Let BA be the ladder and AC be the wall as shown above.
Then the distance of the foot of the ladder from the wall = BC
Given that BA = 10 m , BAC = 60°