Q.) The cost of the paint is 36.50 per kg. If 1 kg of paint covers 16 square feet, how much will it cost to paint outside of a cube having 8 feet each side?
Side of each side of cube = 8 feet.
A cube has 6 faces . Each face will be square.
Hence , the area of each face of cube = 8*8 = 64 sq feet
Total area of Faces of Cube = 6*64 = 384 sq feet
16 sq feet is covered by 1 kg of paint.
So, 384 sq feet will be covered by = 24 kg of paint.
Cost of 1 kg of paint = 36.50 Rs.
Cost of 24 kg of paint =24 X 36.50 Rs. = 876 Rs.