find the surface area and volume of a cylindrical pen stand of radius 3cm and height of 10.5 cm
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surface area of pen stand = 2πrh + πr^2
= 2×3.175×3×10.5 + 3.175×3×3
=200.025+28.575
=228.6 cm^2
Volume = πr^2h
= 3.175×3×3×10.5
=300 cm^3
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