21. Determine the altitude of the helicopter

A passenger in the helicopter spots a ship and a blue whale at an angle of 30\(^{\circ}\) and 45\(^{\circ}\), respectively. If the ship is exactly behind the whale, then the distance between them is 101 \(m\), then the altitude of the helicopter above the sea level is 137.98136.98138.98139.98 \(m\). (Use \(\sqrt{3} = 1.732\))