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Question

Two identical prisms with right triangles as the base are joined to form a rectangular prism. The height of each right triangle is 4 m and base is 5 m. Find the perimeter of the base of the rectangular prism.


A

19 m

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B

16 m

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C

17 m

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D

18 m

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Solution

The correct option is D

18 m


Base perimeter of the rectangular prism = 2 x ( Height of right triangle + Base length of the right triangle )

Perimeter of base of the rectangular prism = 2 x ( 4 + 5 )
= 2×9
= 18 m


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