Sheryl P.

asked • 04/22/17

Please help me! I did my math homework, but I don’t know what went wrong.

I can’t draw the figure that I am trying to find the surface area of for you, so please go to: and look at number 11. The formula my teacher gave us for figuring it out is (2𝜋rh + 2𝜋r²)divided by 2 for the half cylinder, and for the rectangular prism the formula she gave us is 2lw + 2lh + 2wh. Then we were told to add both answers. Maybe I input wrong #’s?: I input 8 as the radius and height, 30 for length, and 16 for width. I did the formula twice on the calculator, and both times I got 2,098.1 -- which isn’t one of the answers. Please help me figure this out.  Thank you so much!

1 Expert Answer


Michael C. answered • 04/22/17

4.9 (10)

Patient and Qualified Math Tutor

Sheryl P.

Thank you so much!  I wish I was as smart as you are!


Michael C.

you are most welcome


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