Question

The area of four walls of a room is 90 m². If the room is 7 m long and 2 m wide, then find the height of the room.
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Answer 1

Answer:

let, height = h

so area,

= 2 [ 7 × 2 + 2 × h + 7 × h ] = 90

= 14 + 9h = 45

= 9h = 31

= h = 31

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