Question

a cone has a circular base of radius 10cm and slant height of 30cm. Calculate the surface area

Answer 1

radius(r)= 10cm
slant height(l)=30cm
therefore tsa=
$\pi \times r \times (l + r)$
22/7×10×(30+10)
->22/7×10×40
->22×400/7
->8800/7
->1257.14