Question

The Base radius of a cone is 5cm. and its height is 12cm. Find its slant height.
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Answer 1

using direct formula

Step-by-step explanation:

l=r2+h2=52+122=13cm

Answer 2

$\Large{\underline{\underline{\bf{Solution}}}}$

Given :-

• The Base radius of a cone is 5 cm.

• The height of cone is 12 cm.

To Find :-

• The slant height of cone.

Solution :-

We know, The slant height of cone is I.

I² = h² + r²

Where,

The base radius of a cone is r = 5cm.

The height of cone is h = 12cm.

I² = h² + r²

➟ I² + (12)² + (5)²

➟ I² = 144 + 25

➟ I² = 169

➟ I = √169

➟ I = 13 cm.

The slant height of cone is 13 cm.

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