The surface area of a cone is given by the formula S = πl + πr2. Solve the formula for l.

Answer: l=(S-πr²)/πStep-by-step explanation:To solve for l, we use our algebraic rules to get l alone.S=πl+πr²            [subtract πr² on both sides]S-πr²=πl             [divide both sides by π](S-πr²)/π=l