Doubt from Fluid mechanics


IN Q1 , option B is also one of the ans but I think that liquid will flow out as level of tube is below water level


How to find time taken ? and for option C , I think that v is max at terminal speed so viscous force is also max but ANS IS A,B,C(INCORRECT)

Yes option b is incorrect for qns 1

Actually the terminal speed is never achieved or it takes infinite time to achieve it

Can you share your opinion about Q2 option C