Find the surface area of the Rectangular Pyramid. Please see the attachment, of course 45 yards ^2 is not the correct answer. Th
2 answers:
Answer:
Surface area = 39 yards²
Step-by-step explanation:
∵ the surface area of the pyramid = 1/2 pl + base area
Where p = perimeter of the base , l = slant height
∵ Area of the base = 3 × 3 = 9 yards²
∵ Perimeter of the base = 4 × 3 = 12 yards
∵ Slant height = 5 yards
∴ The surface area = 1/2 × 12 × 5 + 9 = 39 yards²
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Answer: </h2>
<u>The correct option is </u><u>(B) 39.8 yd² </u>
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Step-by-step explanation: </h2>
A rectangular pyramid consists of four triangular lateral faces and a rectangle base. The sum of the area of the rectangle base and area of the four triangular lateral faces gives the surface area of rectangular pyramid. We use the following formula
Surface Area = Base Area + Lateral Area
where
Base Area = l × b
and
Lateral Area = 1/2 ls1 + 1/2 bs2 + 1/2 ls1 + 1/2 bs2 = ls1 + bs2
So
Surface Area = Base Area + Lateral Area
SA = lb + ls1 + bs2
Putting the values we get 39.9
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your answer is option d
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