Question

The length, width, and height of the wooden box are 12.3 inches, 6.4 inches, and 7.5 inches respectively. The cost of painting the box is $0.25 per square inches. Find the total cost of painting the box.

Answer 1

Explanation:

Formula

The first thing you must do is find the surface area. The formula is right below this sentence.

Surface area = 2*L*w + 2*L*h + 2 * w * h Substitute givens into this formula

• L = length
• w = width
• h = height

The choice of what to make the Length, width and height is arbitrary

Givens

• L = 12.3 inches
• w = 7.5 inches
• h = 6.4 inches

Solution

Surface area = 2*12.3*7.5 + 2*12.3*6.4 + 2*7.5*6.4

Surface area = 184.5 + 157.44 + 96

Surface area = 437.94 in^2

Cost of Paint

The question is not really about Surface Area. The question is about the cost of paint given that 1 square inch costs 0.25 dollars.

Cost = Surface Area * 0.25

Cost = 109.485 dollars or

Cost = 109.49 rounded.