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Chris made a solid by joining two identical rectangular prisms as picture blow. The overall dimensions of the composite solid are 20 centimeters (cm) by 18 centimeters by 15 centimeters. What is the surface area, in square centimeters, of a single prism?

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Chris made a solid by joining two identical rectangular prisms as picture blow. The overall dimensions of the composite solid are 20 centimeters (cm) by 18 cent class=

Answer :

Answer:

B

Step-by-step explanation:

Base area = (base x width) = 20 x 18 = 360 cm^2

Base perimeter = (base + width) x 2 = (20 + 18) x 2 = 76 cm

lateral surface = (base perimeter x height) = 76 x 15 = 1140 cm^2

Surface area = (base area x 2) + lateral surface = (360 x 2) + 1140= 1860 cm^2

surface area of a single prism = 1860 / 2 = 930 cm^2

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