Question 558196
find the length of the slant height of a cone with a radius of 5 cm and a surface area of 235.5 cm2
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Surface area formula: S.A. = {{{(pi*r*s) + (pi*r^2)}}}, where r=radius, s=slant height
{{{(pi*5*s) + (pi*5^2)}}} = 235.5
15.7s + 78.54 = 235.5
15.7s = 235.5 - 78.54
15.7s = 157
s = {{{157/15.7}}}
s = 10.0 cm is the slant height
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How about this? Did you understand what we did here? C
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PS, you do not want to put brackets around the text!