A ball which is thrown vertically up from the top of a tower

Last updated: 6/8/2023

A ball which is thrown vertically up from the top of a tower reaches the ground in 20s Another vertically downwards from the same position with the same velocity takes 10s to reach the ground What was its initial velocity take g 10 ms 2 O O 20 ms 30 ms 50 ms 1 1 1 20 ms