A triangular tank measuring 12m tall, 15m long, and 4m acros…

A triangular tank measuring 12m tall, 15m long, and 4m across contains water 6m deep. Which of the following integrals represents the work required to pump all the water out of the top of the tank? (Assume the acceleration due to gravity is 10 m/s\(^2\) and the density of water is 100 kg/m\(^3\).)