A stone dropped from a balloon which is at a height ℎ, reaches the ground after 𝑡 second. From the same balloon, if two stones are thrown, one upwards and the other downwards, with the same velocity 𝑢 and they reach the ground after 𝑡1and 𝑡2 second respectively, then

Question : A stone dropped from a balloon which is at a height ℎ, reaches the ground after 𝑡 second. From the same balloon, if two stones are thrown, one upwards and the other downwards, with the same velocity 𝑢 and they reach the ground after 𝑡1and 𝑡2 second respectively, then