Find the lateral surface area of a right circular cone whose haight is 28 cm and radius of
base is 21 cm. Find also its whole surface area.
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Step-by-step explanation:
lsa =pi*r*underrot h^2+r^2
LSA=22/7*21*underrot 28^2+21^2
LSA=66*underrot 784+441
LSA=66*35
LSA=2310cm^3
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