# A ball is dropped from the roof of a tower of height h.The total distance covered by it in the last second of its motion is equal to the distance covered by it in first three seconds.The value of h is $(g=10 m/s^2)$
$(a)\;125 \;m \quad (b)\;200\; m \quad (c)\;100\; m \quad (d)\;80\; m$