The total surface area of a cone of radius r2 and length 2l, is(a) 2πr (1+r)(b) πr1+r4(c) πr (1+r)(d) 2πrl

The total surface area of a cone of radius r2 and length 2l, is(a) 2π

1.	The total surface area of a cone of radius r2 and length 2l, is(a) 2πr (1+r)(b) πr1+r4(c) πr (1+r)(d) 2πrl
Answer» The total surface area of a cone of radius $\frac{r}{2}$ and length 2l, is (a) 2 $π r (1 + r)$ (b) $πr (1 + \frac{r}{4})$ (c) $π r (1 + r)$ (d) 2 $π r l$