One side of a square tile is 10 cm.How many such tiles will be required to cover one side of a 2.5m long and 2m high wall?
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The side of a square tile is 10 cm=0.1 m. One side of a wall which is 2.5 m long and 2 m high, Area of wall = 2.5*2=5.0 meter square . Therefore, 500 tiles need to be used
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the answer of 21st question is 240 marble
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