Question

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Answer 1

Step-by-step explanation:

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Answer 2

Question:

Circumference of the base of cone is 66cm and height is 12cm

Find the volume.

Answer:

$\bullet$ Given:

→ Circumference of the base of cone is 66 cm

→ Height is 12 cm

$\bullet$ To Find:

→ Volume of cone.

$\bullet$ Solution:

$\large{\blue{\sf{1. Finding \;the\; radius,}}}$

$\green{\large{\boxed{\sf{Circumference = 2 \pi r}}}}$

⇒ 2πr = 66

⇒  r = 66 ÷ 2π

$\purple{\implies \boxed{r = 10.5 \;cm}}$

$\large{\green{\sf{2. Finding\; the\; volume, }}}$

$\orange{\large{\boxed{\rm{Volume \;of \;a \;cone = \dfrac{1}{3} \pi r^2h}}}}$

$\rm{Volume = \dfrac{1}{3} \, \pi\, (10.5)^2\, (12)}$

$\large{\pink{\boxed{\sf{Volume = 1386\; cm^2}}}}$