60 points

a composite figure is made up of a rectangular prism sandwiched between two halves of a cylinder. which of the following surface area equations could you use to find the total surface area of the solid?

SA = 2lw + 2lh + 2wh

SA =2πrh+ 2πr2

Step-by-step explanation:

Hi, to find the total surface of the solid we have to sum the surface area of each of the different solid parts that made up the total solid.

So, we have a rectangular prism

Surface area of a rectangular prism: A = 2wl + 2lh + 2hw,

Where:

w = width

l= Length

H= height

And 2 halves of a cylinder. 2 halves of a cylinder are equal to a full cylinder so:

Surface area of a cylinder = 2πrh+ 2πr2  

Where r is the radius

So, the correct options are:

SA = 2lw + 2lh + 2wh

SA =2πrh+ 2πr2

56

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