Sita had to make a model of cylindrical kaleidoscope for her science project. She wanted to use black chart paper to make the curved surface of the kaleidoscope. What would be the area of chart paper required by her, if she wanted to make a kaleidoscope of length 30cm with a 2.7 cm radius? (Use p=22/7)
Answers
Answered by
21
Step-by-step explanation:
Radius of the base of the cylindrical kaleidoscope (r) = 3.5 cm.
Height (length) of kaleidoscope (h) = 25 cm.
Area of chart paper required = curved surface area of the kaleidoscope
= 2πrh
=2×22 /7×3.5× 25 cm 2
= 550 cm2
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Answered by
11
Step-by-step explanation:
Area of the chart paper required= CSA of cylindrical kaleidoscope
CSA of cylindrical kaleidoscope= 2πrh
= 2×22/7×2.7×30
= 509.142 cm²
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