The sonar unit on a boat is designed to measure the depth of freshwater (p= 1.00X10^3 kg/m^3, Bad= 2.20X10^9 Pa). When the boat moves into salt water (p= 1025 kg/m^3, Bad = 2.37 x 10^9 Pa), the sonar unit is no longer calibrated properly. In salt water, the sonar unit indicates the water depth to be 12.4m. What is the actual depth (in m) of the water?
