Answer :

Given:

Radius (r) of cylindrical part = 3.5 cm


Radius (r) of hemispherical part = 3.5 cm


Height of cylindrical part (h) = 10 cm


Surface area of article = CSA of cylindrical part + 2 × CSA of hemispherical part


= 2 πrh + 2 × 2 πr2


= (2 π × 3.5 × 10) + (2 × 2 π × 3.5 × 3.5)


= 70 π + 49 π


= 119 π


= 17 × 22


= 374 cm2


Hence, the total surface of the article = 374 cm2

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