Mensurationmedium · Past Paper
A tent is in the form of a cylinder surmounted by a cone. If the height and diameter of the cylindrical part are 2.1 m and 4 m, and slant height of the cone is 2.8 m, find the area of the canvas used.
A44 sq. m
B54 sq. m
C33 sq. m
D66 sq. m
✓ Correct Answer: A — 44 sq. m
Canvas = CSA of cylinder + CSA of cone = 2πrh + πrl = πr(2h + l) = (22/7)*2*(4.2 + 2.8) = (44/7)*7 = 44 sq. m.
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