For which job do you need ONLY the curved surface area of a cylinder?

Class 8Surface Area of a CylinderMensuration

AGift paper to cover a closed round box fully
BPaint for a closed gas cylinder, all over
CTin sheet to make a closed tin
DPaper label wrapped around a jam jar

Step-by-Step Solution

A label goes round the side only, so it needs the curved surface area 2πrh. The other three jobs also cover the top and bottom, so they need the total surface area.

Answer: D) Paper label wrapped around a jam jar

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