Question

please solve the above question

Answer 1

then the velocity should be tripled

Answer 2

Ahoy ! 

V° = $\sqrt{2 gh }$ 

AS the h' = 3h 

now the V' new  velocity we need 

v' = √ 2 g h'


v' = √ (2g 3h )

v' = √ 3 x √(2gh)

V' = √3 V m/s 
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Hope it helps you : ]