Rotating 7947

In the rotating cone = 100π
S rotating cone = 90π
v =?
r =?

Correct answer:

r1 =  5
v1 =  12
r2 =  4.4721
v2 =  15

Step-by-step explanation:

V = 100   pi S = 90   pi  s = r2+v2  V = π r2 v/3 S = π r s + π r2  300 = r2  v 90 = r r2+v2 +  r2  v = 300/r2  90 = r r2+3002/r4 +  r2  r1=5
v1=300/r12=300/52=12
r2=2 5=2 5=4.4721
v2=300/r22=300/4.47212=15



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