Question 1005136

the formula for the lateral surface area of a pyramid is {{{A=pi*r*s}}}

if given

Diameter{{{d=28cm}}}=> radius {{{r=d/2=28cm/2=14cm}}}
Slanting height {{{s=30cm}}}

we have

{{{A=pi*14cm*30cm}}}

{{{A=420*pi*cm^2}}}......{{{pi=3.14}}}

{{{A=420*3.14cm^2}}}

{{{A=1318.8cm^2}}}