Question
Download Solution PDFTo have a surface area of 9π square units of a ball, what should be the diameter (in units) of the ball?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven :
Surface area = 9π
Formula Used :
Surface area of sphere = 4πr2
Calculation :
⇒ 9π = 4πr2
⇒ r2 = 9/4
⇒ r = 3/2 = 1.5
⇒ Diameter = 2r = 2 × 3/2 = 3 units
∴ The correct answer is 3.
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