Question

does CSA of a cone whose radius is 3.5 cm and slant height 4 cm​

Answer 1

Answer:

43.98cm^2

Step-by-step explanation:

CSA of a cone = πrl = 3.14×3.5×4 = 43.98cm^2

Answer 2

Correct Question :

Find the CSA of a cone whose radius is 3.5 cm and slant height 4 cm​.

-------------------

Before, finding the answer. Let's find out we can find the answer.

• Here, in this question, we are asked to find the CSA of the cone, which is the Curved Surface Area.
• So, to find the Curved Surface Area, we must use the formula of :

$\boxed{ \tt Curved \: Surface \: Area = \pi rl }$

• Where, we have to multiply pi, radius, and height.

Here,

π = ${ \tt \dfrac{22}{7} }$

___________________________

Given :

• Radius = 3.5 cm
• Height = 4 cm

To find :

• CSA (Curved Surface Area)

Solution :

Curved Surface Area = πrl

                                   = π × r × l

                                   = ${\tt \dfrac{22}{7} \times 3.5 \times 4 }$

                                   = ${\tt \dfrac{22}{7} \times 14 }$

                                   = ${\tt \dfrac{22 \times 14}{7} }$

                                   = ${ \tt \dfrac{308}{7} }$

                                   ${ \tt = 44 }$

Therefore, Curved Surface Area of Cone is 44 cm².