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Known :
Diameter = 14 cm
Radius = 14 ÷ 2 = 7 cm
Tube height = 21 cm
Problem :
Building volume = ... ?
Answer :
Step 1
Tube volume = π × r² × t
= × 7 × 7 × 21
= 22 × 7 × 21
= 154 × 21
= 3234 cm³
Step 2
½ Ball Volume = × π × r²
= × × 7 × 7
= 3 × 11 × 7
= 33 × 7
= 231 cm³
Step 3 last
Building volume = Tube Volume + ½ ball volume
= 3234 cm³ + 231 cm³
= 3465 cm³
So, we get the answer is a 3465 cm³
_______Happy Study_______
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semoga bisa membantu ...
Known :
Diameter = 14 cm
Radius = 14 ÷ 2 = 7 cm
Tube height = 21 cm
Problem :
Building volume = ... ?
Answer :
Step 1
Tube volume = π × r² × t
=
× 7 × 7 × 21
= 22 × 7 × 21
= 154 × 21
= 3234 cm³
Step 2
½ Ball Volume =
× π × r²
=
× 
× 7 × 7
= 3 × 11 × 7
= 33 × 7
= 231 cm³
Step 3 last
Building volume = Tube Volume + ½ ball volume
= 3234 cm³ + 231 cm³
= 3465 cm³
So, we get the answer is a 3465 cm³
_______Happy Study_______