If the diameter of the base of a cone is 42 cm and its curved surface area is 2310 cm², then what wil be its volume (in cm³) ?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 ie 12936.
CSA = πrl = 2310
πr = 66 [r = 21cm]
l = 2310 / 66 = 35
l = 35, h = 28
V = (1/3)πr2h = 12936 cm3