Calculate 5115

In the rotating cylinder it is given: V = 120 cm3, v = 4 cm. Calculate r, S mantle.

Correct answer:

r =  3.0902 cm
S2 =  77.665 cm2

Step-by-step explanation:

V=120 cm3 v=4 cm S=V/v=120/4=30 cm2 r=S/π=30/3.1416=3.0902 cm
o=2π r=2 3.1416 3.090219.4163 S2=o v=19.4163 4=77.665 cm2

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