Question

Find the cost of painting a cube at ₹9 per m square whose edge is 8m

Answer 1

cost will be rs.256 gikvy

Answer 2

Given:
Rate of painting the cube = Rs. 9/sq. m
Edge of cube = 8 m

To Calculate:
Cost of painting the cube

Calculation:
As we know that, paint is always done on total surface area of any given solid.
Total Surface Area of cube = 6 * (side/edge)²
TSA = 6 * (8)²$\:\:\:\:\:\:\:\:$[Since, 8² = 64]
TSA = 6 * 64
TSA = 384 sq. m

Now we also know that cost is equal to product of rate and quantity of given substance.
Cost of painting the cube = Rate of paint * TSA of Cube
Cost of painting the cube = Rs. 9 * 384
Cost of painting = Rs. 3456