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A room 4.9 m long and …

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A room 4.9 m long and 3.5m broad is covered with carpet leaving an uncovered margin of 25cm all around the room. If the breadth of the carpet is 80 cm find its cost at Rs 80 per metre

    • Posted by Madhu Kumari 6 years, 2 months ago

    CBSE > Class 10 > Mathematics
    • 1 answers

    Sia ? 6 years, 2 months ago

    Width of the room left uncovered = 0.25 m 
    Now, Length of the room to be carpeted = 4.9 - (0.25+0.25) = 4.9 -0.5 = 4.4 m
    Breadth of the room be carpeted = 3.5 - (0.25+0.25) = 3.5-0.5 = 3 m
    Area to be carpeted = 4.4 {tex}\times{/tex} 3 = 13.2 m2
    Breadth of the carpet 80 cm = 0.8 m
    We know, Area of the room = Area of the carpet
     Length of a carpet = {tex}\frac { \text { Area to be carpeted } } { \text { Width of a carpet } }{/tex} = {tex}\frac { 13.2 } { 0.80 }{/tex} = 16.5
    Cost of carpet = Rs. 80 per metre
    {tex}\therefore{/tex} cost of 16.5 m carpet = Rs. 80 {tex}\times{/tex} 16.5 = Rs. 1320

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