Question

if C is the curved surface area of thecone ,then express its radius in terms of I. other dimensions ( with usual notations)​

Answer 1

Answer:

CSA OF CONE= 22/7×R×L

NOW R/H= 3/4=TAN THETA

DIVIDING BY A 5 ON LHS BOTH SIDES 3/5/4/5= SIN THEATA/COS THEATA

SO L= 5 (as L IS A SLANT HEIGHT )

R= 3

CSA = 22/7×5×3

=47.14 Square unit

Answer 2

Answer:

r = C / πl

Step-by-step explanation:

Given:- C is the curved surface area of the cone.

To Find:- Express radius in terms of l i.e. slant height.

Solution:-

A Cone is a three-dimensional geometrical shape that has a circular base and narrows down to a sharp point called Vertex. It has one face and one vertex. There are no edges present in a cone. The three main elements of a cone are radius(r), slant height ( l ) and height (h).

As we know,

⇒ Curved surface area =  Circumference of circle/Arc length of sector ×

                                                                                                 Area of circle

⇒ C = 2πr / 2πl × π$l^{2}$

⇒ C = πrl

⇒ r = C / πl

Therefore, radius r in terms of l is r = C / πl.

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