JEE Main Physics question

PhysicsMotion in a Straight LineJEE Main

A stone dropped from a building of height and it reaches after seconds on earth. From the same building if two stones are thrown (one upwards and other downwards) with the same velocity and they reach the earth surface after and seconds respectively, then [CPMT 1997, UPSEAT 2002, K CET 2002]

Answer: (D)

Solution

Standard identity for this classic configuration: .

Question ID VK-152344