Three metal balls with volumes V1=81 cm3 V2=96 cm3 and V3=28 cm3 melted into one ball. Determine its surface area.

Correct answer:

S =  168.13 cm2

Step-by-step explanation:

V1=81 cm3 V2=96 cm3 V3=28 cm3  V=V1+V2+V3=81+96+28=205 cm3 V = 34 π r3  r=34π3 V=34 3.14163 2053.6578 cm  S=4π r2=4 3.1416 3.65782=168.13 cm2

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