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Two identical prisms with right triangles as base are joined to form a rectangular prism as shown below:What is total surface area? |
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Answer» The sides of the rectangular prism are Length = 12 cm Breadth = 5 cm and Height = 15 cm. Base area = 2 × perimeter of rectangle 2 × 12 × 5 = 120 cm2 Lateral surface area = base perimeter × height = 2 (length + breadth) × height = 2(12 + 5) × 15 = 2 × 17 × 15 = 510 cm2 Total surface area = 120 + 510 = 630 cm2 |
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