Question

what is the surface area?

Answer 1

You need to find the area of each surface, and sum them. You've got 3 rectangles and 2 triangle. Area of a rectangle is length * width, area of a triangle is 1/2 base * height.

Answer 2

The only moderately tricky part here is visualizing the dimensions of the back side of the prism.

Answer 3

is it 42m2

Answer 4

that seems a little low, given that the area of the front face is 5 m*7 m= 35 m^2...

Answer 5

42 is the lowest option i have and 117 is the highest.

Answer 6

You've got the big front face, 5x7. You've got the 2 end triangles with base 3 and height 4. You've got the bottom face, which is 3x7. Finally, you've got the back face with is 4x7.
We get the 4 from the height of the triangles, and because the front face is a rectangle with 7 along the bottom and top, we know that the back face must also be 7 along bottom and top.

Answer 7

If 1 of the 5 sides takes up 35 m^2 all by itself, and another side is nearly as large, 42 m^2 isn't going to be a likely correct answer.

Answer 8

the highest the multiple choice will go is 117 see. forty-two square meters

forty-five square meters

ninety-six square meters

one hundred seventeen square meters

Answer 9

It doesn't matter what choices you have — you have all the information you need to figure out the answer.

Answer 10

Find the area of a a 5x7 rectangle (front face). Find the area of a 3x7 rectangle (bottom face). Find the area of a 4x7 rectangle (back face). Find the area of 2 triangles with base 3 and height 4 (2 ends). Add them up. You'll find the result is on the list of choices.

Answer 11

84m2

Answer 12

well oh well ill just guess....

Answer 13

No need to guess. This is simple arithmetic. What is 5*7? What is 3*7? What is 4*7? What is 2 * 1/2 * 3 * 4? What do you get when you add them up?

Answer 14

oh ok thnx....

Answer 15

96m2

Answer 16

There you go!

Answer 17

I think you forgot to add the 2 triangles when you came up with 84 m^2, right?

Answer 18

no