Wt is bag's speed whn it hits grnd aftr releasd frm hot air balon 40.8m abv ground w/constnt veloct of 10.0m/s

A ballonist, riding in a basket of a hot air balloon that is rising vertically with a constant velocity of 10.0 m/s, releases a sandbag when the balloon is 40.8 above the ground. Neglecting air resistance, what is the bag's speed when it hits the ground?