The curved surface (area) of a right circular cone of radius $11.3$ cm is $355$ ${cm}^{2}$ . What is the slant height of the cone ? $π = \frac{22}{7}$

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Solution

Curved surface are $= 335 c m^{2} = π r l$
Radius of the base of the cone
$= 11.3 c m = r$
$l = \frac{355}{π r}$
$= 355 \times \frac{7}{22} \times \frac{1}{11.3}$
$= 10 c m$

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The curved surface (area) of a right circular cone of radius 11.3 cm is 355 cm2. What is the slant height of the cone ? π=227

Curved surface are =335cm2=πrlRadius of the base of the cone=11.3cm=rl=355πr=355×722×111.3=10cm

The curved surface (area) of a right circular cone of radius $11.3$ cm is $355$ ${cm}^{2}$ . What is the slant height of the cone ? $π = \frac{22}{7}$

Curved surface are $= 335 c m^{2} = π r l$
Radius of the base of the cone
$= 11.3 c m = r$
$l = \frac{355}{π r}$
$= 355 \times \frac{7}{22} \times \frac{1}{11.3}$
$= 10 c m$