A man holds an umbrella at 30^o with the vertical, to keep himself W. He, then, runs at a speed of 10 ms^-1, and find the rain drops to be hitting vertically, Study the following statements and find the correct options, 

i. Velocity of rain w.r.t. Earth is 20 m s^-1 

ii. Velocity of rain w. r.t. man is $10\sqrt{3}$m s^-1 

iii. Velocity of rain w.r.t. Earth is 30 m s^-1 

iv. Velocity of rain w.r.t. man is $10\sqrt{2}$ ms^-1