A balloon is rising up with an acceleration of 10`m//s^(2)`. A body is dropped from the balloon when its velocity is 200 `m//s`. The body strickes the ground in half a minute. With that velocity did the body hit the ground ? Take `g=9.8m//s^(2)`.

Explanation

Initial velocity of body `u=200 m//s`
`a=g=9.8 m//s^(2)`
`t=(1)/(2)min=30s`
`v=?` From `v-u+at`
`v=-200+9.8xx30=94 m//s`.