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marshall27 [118]
2 years ago
14

The surface area of a rectangular prism is 198 cm2. Two of the dimensions are 3 cm and 9 cm. Find the measure of the other dimen

sion.
Mathematics
1 answer:
Alecsey [184]2 years ago
7 0

In this question, it is given that two of the dimensions are 3 cm and 9 cm . Let the other dimension be x cm .

And the surface area of the rectangular prism is given. Now we use the formula of surface area of prism, which is

A = 2(length* width + width * height + length * height )

198 = 2(3*9 + 3*x + 9*x)

99 = 27 + 12x

Subtracting 27 to both sides,

72 = 12x

Dividing both sides by 12

x = 6

So the length of the remaining dimension is 6 cm .

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