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RD Sharma Solutions Class 8 Mathematics Solutions for Surface Area and Volume of Right Circular Cylinder Exercise 22.2 in Chapter 22 - Surface Area and Volume of Right Circular Cylinder
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The area of the base of a right circular cylinder is 616 cm2 and its height is 25 cm. Find the volume of the cylinder.
Answer:
We have,
Area of base of right circular cylinder = 616 cm2
Height of cylinder = 2.5 cm
Let the radius of cylinder be ‘r’ cm By using the formula,
Area of base of right circular cylinder = πr2
So,
πr2 = 616
22/7 × r2 = 616 r2 = 616 × 7/22
= 196
r = √196
= 14cm
∴ Curved surface area of cylinder = 2πrh
= 2 × 22/7 × 14 × 2.5
= 220 cm2
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