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Standard VI

Mathematics

Area

A typist uses...

Question

A typist uses a sheet measuring $20 c m$ by $30 c m$ lengthwise. If a margin of $2 c m$ is left on each side and a $3 c m$ margin on top and bottom, then the percent of page used for typing is:

40

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60

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64

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72

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Solution

The correct option is C $64$
Area of the sheet $= 30 \times 20 = 600 c m^{2}$
Area of the sheet used for typing
$= (30 - 6) \times (20 - 4)$
$= 24 \times 16$
$= 384 c m^{2}$
$∴$ % of sheet used for typing $= \frac{384}{600} \times 100 = 64 %$

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

The correct option is C 64Area of the sheet =30×20=600cm2Area of the sheet used for typing =(30−6)×(20−4) =24×16=384cm2∴ % of sheet used for typing =384600×100=64%

A typist uses a sheet measuring $20 c m$ by $30 c m$ lengthwise. If a margin of $2 c m$ is left on each side and a $3 c m$ margin on top and bottom, then the percent of page used for typing is:

The correct option is C $64$
Area of the sheet $= 30 \times 20 = 600 c m^{2}$
Area of the sheet used for typing
$= (30 - 6) \times (20 - 4)$
$= 24 \times 16$
$= 384 c m^{2}$
$∴$ % of sheet used for typing $= \frac{384}{600} \times 100 = 64 %$