alleryA toy is a cone on a hemisphere of radius 3.5 cm, slant height 6 cm. Find its surface area. (π = 22/7)
A154 cm²
B143 cm²
C77 cm²
D121 cm²
Answer & Solution
Correct answer: B. 143 cm²
Surface is hemisphere 2πr² = 77 plus cone πrl = 66, giving 143 cm².
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