The expenditure of covering the four wal...

The expenditure of covering the four walls with papers at the rate of 70 paise per sq-metre is ₹ 157.50 . If the height of the room be 5 metres and the ratio of the length and breadth of the room be 4 : 1, then what will be the length and breadth of the room ?

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The correct Answer is:

Length 16 cm breadth and thickness 12 cm , 4cm

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