A football kicked vertically up reaches a height H and comes down to the starting point in 4 seconds. what is the value of "H"
a) 9.8 m b)2×9.8 m c)3×9.8 m d)4×9.8 m
the answer in my textbook is 2×9.8 m. I am getting the answer a) 9.8 m.
Please solve it urgently.