half cubic metre of goldsheet is extended by hammering so as to..., Area & Volume, General Mathematics

Question:Half cubic metre of goldsheet is extended by hammering so as to cover an area of `1` hectare. The thickness of the sheet is :

A `0.5 cm` 
B `0.05 cm` 
C `0.005 cm` 
D `.0005 cm`

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+ AnswerC

+ ExplanationVolume of gold 

`= (1/2 xx 100 xx 100 xx 100) cu. cm`.

Area of sheet 

`= 10000 sq. m`

`= (10000 xx 100 xx 100) sq. cm.`

:. Thickness of the sheet 

`= ((1 xx 100 xx 100 xx 100)/(2 xx 10000 xx 100 xx 100)) cm.`

`= 0.005 cm.`

+ Report

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