Savitri had to make a model of a cylindrical Kaleidoscope for her science project. She wanted to use chart paper to make the curved surface of the Kaleidoscope. What should be the area of chart paper required by her, if she wanted to make a Kaleidoscope of length 25 cm with a 3.5 cm radius ?

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Solution

$r = 3.5$ $c m$
$h = 25$ $c m$
Area of chart paper required = $2 π r h = 2 \times \frac{22}{7} \times 3.5 \times 25 = 550$ $c m^{2}$

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Savitri had to make a model of a cylindrical Kaleidoscope for her science project. She wanted to use chart paper to make the curved surface of the Kaleidoscope. What should be the area of chart paper required by her, if she wanted to make a Kaleidoscope of length 25 cm with a 3.5 cm radius ?

r=3.5 cmh=25 cmArea of chart paper required = 2πrh=2×227×3.5×25=550 cm2

$r = 3.5$ $c m$
$h = 25$ $c m$
Area of chart paper required = $2 π r h = 2 \times \frac{22}{7} \times 3.5 \times 25 = 550$ $c m^{2}$