Problem Of The Week 17
Two points are selected randomly on the surface of a sphere of radius R. What is the expected distance between them, along the surface of the sphere?
Problem is simple if you think logically, else you will have issues. This question is taken from teh CAT quant Blog by Suresh, the link of which you can see on the right!
Tipster: The sum of the two legs of a right angled triangle is equal to sum of diameters of incircle and circumcircle 🙂