Volumes Practice Test 2

Question : 1 of 40

Marks: +1, -0

What is the total surface area of a right circular cone of height 14 cm and base radius 7 cm.

Solution:

Slant height, l =

√{14^2+7^2}

√{245}

= 15.65 cm
Total surface area of the cone = πr (l + r)
=

{22}/7 × 7 (15.65+7)

= 22 × 22.65 = 498.30

cm^2

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