Subject: General Aptitude · Chapter: Volume and Surface Area · Exam: · Marks: · Difficulty:
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?
(a)₹ 692
(b)₹ 768
(c)₹ 876
(d)₹ 972
(e)None of these
Answer
Answer (as printed): C
Explanation
Surface area of the cube $=\left(6 \times 8^{2}\right) \mathrm{sq} . \mathrm{ft} .=384 \mathrm{sq} . \mathrm{ft}$. Quantity of paint required $=\left(\frac{384}{16}\right) \mathrm{kg}=24 \mathrm{kg}$. $$\text { ∴ Cost of painting }=₹(36.50 \times 24)=₹ 876 \text {. }$$