Multiple choice

What would be the cost of laying a carpet on a floor which has its length and breadth in the ratio of 23: 12 and its perimeter 210 feet, if the cost per square feet of laying carpet is Rs. 4.50? फर्श पर एक कालीन बिछाने की लागत क्या होगी, जिसकी लंबाई और चौड़ाई 23: 12 के अनुपात में है और इसकी परिधि 210 फीट है, यदि कालीन बिछाने की प्रति वर्ग फुट लागत रु. 4.50 है?

  1. Rs. 12178

  2. Rs. 11178

  3. Rs. 10178

  4. Rs. 14728

  5. Rs. 13178
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B Correct answer
Explanation

Let length = 23x, breadth = 12x. Perimeter = 2(23x + 12x) = 70x = 210, so x = 3. Area = 23x × 12x = 276x² = 276 × 9 = 2484 sq ft. Cost = 2484 × 4.50 = 11178.

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