A ball throuwn vertically upwards with a speed of `19.6ms^(-1)` from the top of a tower returns to the earth in 6s. Find the height of the tower.

Explanation

using `s= ut+(1)/(2) at^(2)`
`-h=19.6 xx 6+(1)/(2)xx(-9.8)xx62`
`h=58.8`m.