Question
Download Solution PDFA cone of slant height 4.2 units has a lateral surface area 13.2 units2. The radius of the base is:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven:
Slant height (l) = 4.2 units
Lateral surface area (A) = 13.2 units2
Formula Used:
Lateral surface area of cone, A = πrl
Where, r = radius of the base
Calculation:
13.2 = π × r × 4.2
⇒ r = \(\frac{132}{ 22/7 × 42}\)
⇒ r = \(\frac{6}{6}\)
⇒ r = 1 unit
∴ The correct answer is option (4).
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