There is a ring road connecting points A, B, C and D. The road is in a complete circular form but having several approach roads leading to the centre. Exactly in the centre of the ringroad there is a tree which is 20 km from point A and point A is on the circular road. You have taken a round of circular road starting from A and finish at the same point after touching points B, C and D. you then drive 20 km interior towards the tree from point A and from there reach somewhere in between B and C on the ring road. How much distance you have to travel from the tree to reach the point between B and C on the ring road?

Options

A. 20 km
B. 15 km
C. 80 km
D. 40 km

Answer

A

Explanation

`A = Starting point + Ending point (Ring road diagram)