Question

Find the total surface area of a cone whose radius is 4 m and height is 3 m.​

Answer 1

Answer:

so simplification

Step-by-step explanation:

A=πrl+πr2

l=r2+h2

Solving forA

A=πr(r+h2+r2)=π·4·(4+32+42)≈113.09734

Answer 2

HERE IS UR ANSWER DEAR,

GIVEN:

CONE:

radius = 4m

height = 3m

TO FIND :

Total slant height

SOLUTION :

slant height = l² = r² + h²

= (4)² + (3)²

= 16 + 9

l² = 25

l. = √25

l. = 5 m

$tsa \: of \: cone \: = \pi \: r(l + r)$

$\: \: \: \: \: \: \: \: \: \: \: \: \: \: = \frac{22}{7} \times 4 (5 + 4)$

$= \frac{22}{7} \times 4 \times 9$

$= \frac{22}{7} \times 36$

$= 113 \: {m}^{2}$

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