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22 votes
22 votes
Please help me find the lateral surface area and the total surface area. You can ignore the work i've done as it is wrong.

Please help me find the lateral surface area and the total surface area. You can ignore-example-1
User Marchica
by
2.5k points

1 Answer

15 votes
15 votes

step 1

Find out the toral surface area

Remember that

The total surface area is the area of all faces of the figure

In this problem

The figure has six rectangular faces

SA=2(5)(7)+2(5)(1)+2(1)(7)

SA=70+10+14

SA=94 mm2

step 2

Find out the lateral area

I will assume that the base of the figure is a rectangle with dimensions 5mm x 7 mm

so

the lateral area is the area of four rectangular faces (without the two faces of the base)

LA=2(5)(1)+2(1)(7)

La-10+14

LA=24 mm2

User Flezcano
by
3.0k points
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