Question
The volume of a cube is 216 cm³. If the cost of
painting the cube is Rs. 12 per cm², then find the cost of painting five faces of the cube.Solution
Let the length of the edge of the cube be ‘x’ cm.
Volume of cube = x³
ATQ;
216 = x³
Or, x = 6
Area of five faces of the cube = 5x² = 5 × 6 × 6 = 180 cm²
Required cost = 180 × 12 = Rs. 2,160
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