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Question

Find (i) the curved surface area and (ii) the total surface area of a hemisphere of radius 7 cm. [2 MARKS]


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Solution

Formula: 0.5 Mark each
Application: 0.5 Marks each

r=7cm

(i) The curved surface area
=2πr2

=2×227×72

=308cm2


(ii) The total surface area of the hemisphere
=3πr2

=3×227×72

=462cm2


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