ABC26GN4792 · Volume and Surface Area
Subject: General Aptitude · Chapter: Volume and Surface Area · Exam: · Marks: · Difficulty:
Half cubic metre of gold sheet is extended by hammering so as to cover an area of 1 hectare. The thickness of the sheet is
(a)0.0005 cm
(b)0.005 cm
(c)0.05 cm
(d)0.5 cm
Answer
Explanation
Volume of gold $=\left(\frac{1}{2} \times 100 \times 100 \times 100\right) \mathrm{cm}^{3}$. Area of sheet $=10000 \mathrm{m}^{2}=(10000 \times 100 \times 100) \mathrm{cm}^{2}$. ∴ Thickness of the sheet = $$\left(\frac{1 \times 100 \times 100 \times 100}{2 \times 10000 \times 100 \times 100}\right) \mathrm{cm}=0.005 \mathrm{cm} .$$
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