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Lubov Fominskaja [6]
4 years ago
11

Please help me, I don't understand this, I will mark brainlist 

Mathematics
1 answer:
PSYCHO15rus [73]4 years ago
8 0
16.25pi

You can get this by first solving for volume of a cylender formula for the 1.5 radius of the outer shell. Then solve for a 1 radius of the inner empty portion. Then subtract the second from the first. 
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