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The length of a hall is 18m and the w...

The length of a hall is 18m and the width 12m. The sum of the areas of the floor and the flat roof is equal to the sum of the areas of the four walls. Find the height of the hall.

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given `l=18m`
`b=12m`
according to question ,
`2lb=2h(l+b)`
`2xx18xx12=2h(18+12)` so ` h=36/5m`
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