(C) Total area of the sheet $= 20\, cm \times 30\, cm = 600\, cm^2$.The width available for typing $= 20\, cm - (2\, cm + 2\, cm) = 20\, cm - 4\, cm =

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(C) Total area of the sheet $= 20\, cm \times 30\, cm = 600\, cm^2$.The width available for typing $= 20\, cm - (2\, cm + 2\, cm) = 20\, cm - 4\, cm = 16\, cm$.The height available for typing $= 30\, cm - (3\, cm + 3\, cm) = 30\, cm - 6\, cm = 24\, cm$.Area used for typing $= 16\, cm \times 24\, cm = 384\, cm^2$.Percentage of the page used for typing $= \left( \frac{384}{600} \right) \times 100 = \frac{384}{6} = 64\%$.

Competitive Quantitative Aptitude Mensuration Measurement of Area

Medium

$A$ typist uses a sheet measuring $20\, cm \times 30\, cm$ lengthwise. If a margin of $2\, cm$ is left on each side and a $3\, cm$ margin on top and bottom,the percent of the page used for typing is

A
$40$
B
$60$
C
$64$
D
$72$

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Measurement of Area

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$A$ typist uses a sheet measuring $20\, cm \times 30\, cm$ lengthwise. If a margin of $2\, cm$ is left on each side and a $3\, cm$ margin on top and bottom,the percent of the page used for typing is

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The difference of the areas of two squares drawn on two line segments of different lengths is $32 \, cm^2$. Find the length of the greater line segment if one is longer than the other by $2 \, cm$. (in $cm$)

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