The scale of the map is $20$ km to a cm. What area of a country will be represented on the map, whose area is $60, 000$ ${km}^{2}$ ?

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Solution

$∴ 20 k m = 1 c m$
$∴ {(20)}^{2} k m^{2} = 1 c m^{2}$
i.e. $400 k m^{2} = 1 c m^{2}$
$∴ 60, 000 k m^{2} = \frac{1}{400} \times 60, 000 c m^{2}$
$= 150 c m^{2}$

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The scale of the map is 20 km to a cm. What area of a country will be represented on the map, whose area is 60,000 km2?

∴20km=1cm∴(20)2km2=1cm2i.e.400km2=1cm2∴60,000km2=1400×60,000cm2=150cm2

The scale of the map is $20$ km to a cm. What area of a country will be represented on the map, whose area is $60, 000$ ${km}^{2}$ ?

$∴ 20 k m = 1 c m$
$∴ {(20)}^{2} k m^{2} = 1 c m^{2}$
i.e. $400 k m^{2} = 1 c m^{2}$
$∴ 60, 000 k m^{2} = \frac{1}{400} \times 60, 000 c m^{2}$
$= 150 c m^{2}$