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A cone of radius 12 cm and height 5 cm is mounted on a cylinder of radius 12 cm and height 19 cm.
Find the total surface area of the figure thus formed.

A.2498 cm^2
B.2376 cm2
C.2476 cm2
D.2400 cm2
Answer and Feedback
Answer:B
Feedback:Slant height of cone, l = √(12^2 + 5^2) = 13 cm
Total surface area of final figure = curved surface area of cone + curved surface area of cylinder + area of base
= ᴨrl + 2ᴨrh + ᴨr^2
= ᴨr (l + 2h + r)
= (22/7) * 12 (13 + 2*19 +12)
= 2376 cm2

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Practice Mensuration Online Test 5 | Englishfreetest.com

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