Answer: 25
Step-by-step explanation: As 2.5 inches is only half of the top part of the cylinder you need to add the additional 2.5 inches. So, 2.5 + 2.5 is 5:
And you need 5 inches for each cylinder.
2.5 + 2.5 = 5
5 x 5 = 25
There's your answer!
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