The heat energy produced by the complete combustion of 25 g of a fuel is supplied to 500g of water to increase the value of temperature from 35℃ to 55℃. Find the calorific value of fuel.
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Side of square = 18cm
Area of square path = 18cm×18cm = 324cm²
Side of tile = 3cm
Area of one tile = 3cm × 3cm = 9cm²
number of tiles can be laid =
= \frac{area \: of \: path}{area \: of \: tile}=
areaoftile
areaofpath
= 324 cm / 9cm
= 36
36 tiles can be laid
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