Mensuration Practice Test 7

Question : 13 of 40

Marks: +1, -0

A toy is in the form of a cone mounted on a hemisphere. The radius of the hemisphere and that of the cone is 3 cm and the height of the cone is 4 cm. The total surface area of the toy. (taking π = 22/7) is:

75.43 sq. cm
103.71 sq. cm
85.35 sq. cm
120.71 sq. cm

Validate

Solution:

Total surface area =

2πr^2 + πrl

[2×{22}/7 ×(3)^2]

[{22}/7 × 3 ×5]

{396}/7+{330}/7

{726}/7

= 103.71

cm^2

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