Base diameter

Calculate the volume and surface of a cone whose base diameter is 6 cm and height is 0.9 dm.

Correct answer:

S =  117.6856 cm2
V =  84.823 cm3

Step-by-step explanation:

D=6 cm h=0.9 dm cm=0.9 10  cm=9 cm  r=D/2=6/2=3 cm h2 = s2r2  s=h2+r2=92+32=3 10 cm9.4868 cm  S1=π r2=3.1416 3228.2743 cm2 S2=π r s=3.1416 3 9.486889.4113  S=S1+S2=28.2743+89.4113=117.6856 cm2
V=31 S1 h=31 28.2743 9=84.823 cm3



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