How to find the work needed to pump water out of a tank in the shape of a triangular prism

[@luisgalvan740]

why was the prism not divided by two for the volume?

[@me89315]

Thank you

[@Yves_onthego]

How did you find the upper bound of the integral. Or in other words, how did you know that the domain for x was 4?

[@nuisance5684]

That's the height of the triangular prism which is 4 m.