correct answer is 64.98 meters.

A fluid with density 1140kg/m3 drains from an open tank through a 1.5m long 0.066m inner diameter pipe with an elbow fitting located at exactly half its length. The angle of the elbow to the horizontal is 68 degrees. You can assume steady state in this time scale. We have a bracket that can provide a maximum restraining torque in the positive z direction around the point at which the pipe meets the tank of 3697Nm. What is the maximum height (in m) of fluid that the tank can hold above the pipe outlet before the bracket breaks? Assume atmospheric pressure is 100530Pa