Question

A ball is projected upwards.Its speed at half of the maximum height is 30m/s. Maximum height attained by the ball is

Answer 1

Answer:

10 m is the maximum height

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Answer 2

Answer:

v^2 - u ^2 = 2as

at first half ,

u = 0

v = 30

a = 10

s = 900 / 20 = 45

at next half ,

u = 30

v = 0

a = 10

s = 45

total height = 90 metre

I think so , this is the answer

I am not sure..