MCQEasy1 mark
1
Choose the correct answers to the questions from the given options. (Do not copy the questions, write the correct answers only.)
The total surface area of a solid sphere (S1) and a solid hemisphere (S2), as shown in the diagram, are equal. The ratio of radii R and r is :
Topic: Mensuration of solids
Previous-year question practice database
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Pick an option and check your answer. The full worked answer is below either way.
Answer
Exam answer
(c) √3 : 2
Explanation
Sphere Total surface area=4πR²; hemisphere Total surface area=3πr². Equality gives 4R²=3r² ⇒R:r=√3:2.
In words
√3 : 2
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