A cubic metre of gold is extended by hammering so as to cover an area of $6$ hectares. What is the thickness of gold in decimal of a cm, correct to the first two significant figures?

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Solution

$1$ cu.m $= 1000000$ cu.cm
$6$ hectares $= 6 \times 10000 \times 10000$ sq.cm
$∴$ thickness of gold $= \frac{1000000}{6 \times 10000 \times 10000}$
$= \frac{1}{600} c m . = 0.0017 c m$

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A cubic metre of gold is extended by hammering so as to cover an area of 6 hectares. What is the thickness of gold in decimal of a cm, correct to the first two significant figures?

1 cu.m =1000000 cu.cm6 hectares =6×10000×10000 sq.cm∴ thickness of gold =10000006×10000×10000=1600cm.=0.0017cm

A cubic metre of gold is extended by hammering so as to cover an area of $6$ hectares. What is the thickness of gold in decimal of a cm, correct to the first two significant figures?

$1$ cu.m $= 1000000$ cu.cm
$6$ hectares $= 6 \times 10000 \times 10000$ sq.cm
$∴$ thickness of gold $= \frac{1000000}{6 \times 10000 \times 10000}$
$= \frac{1}{600} c m . = 0.0017 c m$