Question

What is the total surface area of a solid cone whose diameter is 10 cm and slant height is 13 cm?
(Take π = 3.142, answer correct to 3 significant figures)
a)187 cm2
b)283 cm2
c)238 cm2
d)150 cm2

Answer 1

TSA of a cone= πrl+πr²3.142×5×13+3.142 ×5×5= 282.78 approx means option b is correct 283 cm2