The diagram is a net right rectangular pyramid. Calculate the total surface area
-
A.
208cm2 -
B.
112cm2 -
C.
92cm2 -
D.
76cm2
Correct Answer: Option C
Explanation
Total surface area = sum of the area of the (bigtriangleup) S + Area of the rectangle
= 2 x Area of (bigtriangleup) PTQ + 2 x Area of (bigtriangleup) QUR + Area of rectangle PQRS
2 x (frac{1}{2})(8 x 4) + 2 x (frac{1}{2})(5 x 4) + 8 x 5
= 32 + 20 + 40
= 92cm2