Question
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 :
Answer: Option B
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Volume of gold = `(1/2 xx 100 xx 100 xx 100) cm^3`
Area of sheet = `10000 m^2` = ` ( 10000 xx 100 xx 100) cm^2`
`:.` Thickness of the sheet = `((1 xx 100 xx 100 xx 100)/(2 xx 10000 xx 100 xx 100)) cm `= 0.005 cm.
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