Circumference 15653

Calculate the surface and volume of a rotating cone whose base circumference is 125.6 cm and the side is 25 cm long.

Correct answer:

S =  2825.3633 cm2
V =  6282.4694 cm3

Step-by-step explanation:

o=125.6 cm s=25 cm  o=2πr  r=o/(2π)=125.6/(2 3.1416)19.9899 cm  h=s2r2=25219.9899215.0135 cm  S1=π r2=3.1416 19.989921255.3633 cm2 S2=π r s=3.1416 19.9899 25=1570 cm2  S=S1+S2=1255.3633+1570=2825.3633 cm2
V=31 S1 h=31 1255.3633 15.0135=6282.4694 cm3

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