Question

the height of a right circular cone is 24 cm and base radius is 7 cm find the curved surface area of the cone?​

Answer 1

$\large\red{\underline{\underline{\bf{\blue{Given}}}}}$

ᴄᴏɴᴇ:-

• Height (h) = 24 cm

• Radius (r) = 7 cm

$\large\red{\underline{\underline{\bf{\blue{To\:Find}}}}}$

• Curved Surface Area (C. S. A)

$\large\red{\underline{\underline{\bf{\blue{Solution}}}}}$

We know that,

➦ Curved Surface Area of Cone = πrl

So,

We have to find 'l'

➦ Slant height (l) = √r² + h²

So,

➭ l = √7² + 24²

➭ l = √49 + 576

➭ l = √625

➭ l = 25 cm

Now,

Curved Surface Area (CSA) = πrl

➭ πrl = 22/7 × 7 × 25

➭ πrl = 22 × 25

➭ πrl = 550 cm²

Hence,

➦ Curved Surface Area of Cone = 550cm²

Mᴏʀᴇ Fᴏʀᴍᴜʟᴀs :-

ᴄᴏɴᴇ ➘

• Volume = 1/3πr²h

• Total Surface Area = πr(l + r)

• Curved Surface Area = πrl

Answer 2

Answer:

Step-by-step explanation:

ᴄᴏɴᴇ:-

Height (h) = 24 cm

Radius (r) = 7 cm

Curved Surface Area (C. S. A)

We know that,

➦ Curved Surface Area of Cone = πrl

So,

We have to find 'l'

➦ Slant height (l) = √r² + h²

So,

➭ l = √7² + 24²

➭ l = √49 + 576

➭ l = √625

➭ l = 25 cm

Now,

Curved Surface Area (CSA) = πrl

➭ πrl = 22/7 × 7 × 25

➭ πrl = 22 × 25

➭ πrl = 550 cm²

Hence,

➦ Curved Surface Area of Cone = 550cm²

Mᴏʀᴇ Fᴏʀᴍᴜʟᴀs :-

ᴄᴏɴᴇ ➘

Volume = 1/3πr²h

Total Surface Area = πr(l + r)

Curved Surface Area = πrl