Question

Pls help
I don’t understand

Answer 1

2916 square inches

Explanation:

Surface area of rectangular prism:

Here, area of the top of the prism is not included.

l = 24 in ; b = 20 in ; h = 16 in

Surface area = lb + 2bh + 2lh

= 24 * 20 + 2*20*16 + 2*24 *16

= 480 + 640 + 768

= 1888 sqaure inches

Surface area of triangular prism:

length = 24 in ; a = b = 16 in ; base = 20 in and height = 13 in

`\sf \text{Base area=$2*(1)/(2)*base *height = base *height$}`

= 20 * 13

= 260 square inches

Surface area = length*(a +b) + base area

= 24*(16+16) + 260

= 24 * 32 + 260

= 768 + 260

= 1028 square inches

Surface area of composite figure = 1888 + 1028

= 2916 square inches