A ball is dropped from a height.

A ball is dropped from a height. If it takes $0.200 \mathrm{~s}$ to cross the last $6.00 \mathrm{~m}$ before hitting the ground, find the height from which it was dropped. Take $\mathrm{g}=10 \mathrm{~m} / \mathrm{s}^{2}$