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=3,14x5x5
=78.5cm
2. L=πxrxr
=3,14x15x15
=706,5cm
3. L=πxrxr
=22/7x49
=154cm
4. L=πxrxr
=3.14x12.5x12.5
=490.625cm
5. L=πxrxr
=22/7x70x70
=15.400cm