The belan consists of one large cylinder and two smaller cylinders. The dimensions are given as follows:
- Large cylinder: radius \( r_1 = 7 \, \text{cm} \), height \( h_1 = 30 \, \text{cm} \)
- Small cylinders: radius \( r_2 = 3.5 \, \text{cm} \), height \( h_2 =
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