A 1-metre tall tank with pentagonal cross sections of area 3 m is filled with water. Let W be the work required to pump out all the water from the top. Approximate W using the trapezoidal rule with n = 2 trapezoids. Assume work is measured in newton-metres (N m). Use a calculator to find a numerical approximation of your final answer to 2 decimal places. For example, if your final answer is then you should enter 3.14 in the box below. In tests and the final exam, you will NOT need to approximate your final answer numerically. Answer: