A classmate leaves a message on your voice mail betting that you cannot throw a stone high enough so it lands on the roof of a 20 -m-high building. As you stare out of your window pondering whether to accept the challenge, the well in the courtyard suddenly gives you an idea. You drop a stone into the well and note that you hear a splash \(4.0 \mathrm{~s}\) later. You repeat the experiment with another stone, but this time you throw the stone down as fast as you can. This time the splash comes \(3.0 \mathrm{~s}\) after the stone leaves your hand. You carry out a quick calculation and then you call back your friend. Should you take the bet?