The length of a hall is 20\ m and wid...

The length of a hall is `20\ m` and width `16\ mdot` The sum of the area of the floor and the flat roof is equal to the sum of the areas of the four walls. Find the height and the volume of the hall.

A

6.45 m

B

7.18 m

C

8.89 m

D

9.20 m

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The correct Answer is:

C

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