A sector of circle of radius 7.2cm which substends an angle of 300\(^o\) at the centre is used to form a cone. What s the radius of the base of the cone?
Take Free Practice Test On 2026 JAMB UTME, Post UTME, WAEC SSCE, GCE, NECO SSCE
Correct Answer: Option A
Explanation:
\(\frac{Q}{360}\) = \(\frac{r}{L}\)
\(\frac{300}{360}\) = \(\frac{r}{7.2}\)
r = \(\frac{300 \times 7.2}{360}\)
= 8cm
\(\frac{Q}{360}\) = \(\frac{r}{L}\)
\(\frac{300}{360}\) = \(\frac{r}{7.2}\)
r = \(\frac{300 \times 7.2}{360}\)
= 8cm