Question

The curved surface area and the slant height of a right circular cone are 858 cm2 and 13 cm respectively. Find its diameter (in cm).

Answer 1

Answer:

42 cm

Step-by-step explanation:

Slant height (l) = 13 cm

πrl = 858

or,

$\frac{22}{7} \times r \times 13 = 858 \\ r = \frac{858 \times 7}{13 \times 22} = 21$

Diameter = 21 × 2 cm = 42 cm