Question

Calculate the curved surface area of a cone whose diameter and slant height are 8cm and 10cm respectively,
(a) 282.9cm2
(b) 2546cm2
(c) 154cm2
(d) 325.3cm2
(e) 100.57cm2
(f)none of the above, type your answer

please show workings​

Answer 1

Answer:

none of the above

2011.4285

Answer 2

csa = πR²+πrl so, 22/7 x4x4, +22/7 x4 x10 taking 22/7 common
Then solving it