find the curved surface area of a cylinder of height 21 cm and base radius 5 cm.
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Answer:
816.81cm²
Step-by-step explanation:
Given,
Height of the cylinder=21cm
Radius of the cylinder=5cm
curved surface area of a cylinder =2πrh+2πr^2
Now,
2πrh+2πr^2
=(2 × 22/7 × 5×21) + (2×22/7×[5]²)
=660+156.81
=816.81 cm²
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