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      Question

      In a rectangular floor of length and breadth of 20

      metres and 8 metres, respectively, square tiles each of 4 metre edge length are to be laid. If the cost of each tile is Rs. 123, then find the total cost of the tiles to be laid in the room.
      A Rs. 1230 Correct Answer Incorrect Answer
      B Rs. 1200 Correct Answer Incorrect Answer
      C Rs. 1240 Correct Answer Incorrect Answer
      D Rs. 1270 Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      Area of the rectangular room = 20 × 8 = 160 m2 Area of each tile = 4 × 4 = 16 m2 So, number of tiles to be laid in the room = (160/16) = 10 So, total cost of all the tiles laid in the room = 10 × 123 = Rs. 1230

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