Question

Assume one kg of paint costs 60 rupees. If one kg paint covers 15 squarefeet, how much will it cost to paint outside of a cube having 10 feet each side?

• A. 2300
• B. 2350
• C. 2400
• D. 2450

Answer 1

Answer: (A)

2300

Answer 2

Surface Area of Cube = 6 × Sides2

= 6 × 102

= 6 × 100

= 600

$\text{Paint required} = \frac{\text{Surface Area Of Cube}}{\text{1 kg paint Area}}$

= $\text{Paint required} = \frac{600}{15}$

$Paint Required$ = $40 kg$

Cost Of Paint = $40 kg \times 60 \frac{rupees}{kg}$

= 2400 rupees

The correct option is (C): 2400