Question

Please take a look at the picture, I need this answer ASAP

Answer 1

Answer:

This is answer. A) 131.95

Answer 2

$\large\bf\underline\red{Given \: :- }</h3><h3>$

• Radius = 3mm
• Height = 11mm

$\large\bf\underline\red{To \: find \: :- }$

• Surface area of cone

$\large\bf\underline\red{Solution \: :- }$

$\bf{Using \: Formula }$

${\bigstar \: {\small{\underline{\boxed{\bf{\red{Surface \: area \: of \: cone = \pi r ( r + \sqrt{h {}^{2} + r {}^{2} } }}}}}}}$

We have,

π = 22/7

r = 3

h = 11

$\sf\longmapsto{ \frac{22}{7} \times 3(3 + \sqrt{11 {}^{2} + 3 {}^{2} } ) } \\ \\ \sf\longmapsto{ \frac{22}{7} \times 3(3 + \sqrt{121 + 9}) } \\ \\ \sf\longmapsto{ \frac{22}{7} \times 3(3 + 11 + 3) } \: \: \: \: \: \: \: \\ \\ \sf\longmapsto{ \frac{22}{7} \times 3(17)} \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \\ \\ \sf\longmapsto{ \frac{22}{7} \times 51 } \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \\ \\ \sf\longmapsto{ \frac{1122}{7} } \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \\ \\ \sf\leadsto{ \boxed{ \sf160.28mm {}^{2} }}$

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