The time it takes for an object dropped from the top of cliff A to hit the water in the lake below is twice the time it takes for another object dropped from the top of cliff B to reach the lake.
(a) The height of cliff A is (1) one-half, (2) two times, (3) four times that of cliff B.
(b) If it takes 1.80 s for the object to fall from cliff A to the water, what are the heights of cliffs A and B?