From the top of a tower a stone is thrown up which reaches the ground in a time t₁. A second stone is thrown down with the same speed reaches the ground in time t2- A third stone is released from rest from the same point which reaches ground in time t3, then
(a) t3 = √t1+t2
(b) = t₁₂
t1 (c) t3 = t2
(d) t₁ = t2 t3