What is the total surface area of this rectangular pyramid?

7500 sq. meters. I haven't done this in a while so you might want to double check before you answer the question. Sorry if this doesn't work.

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

hope it