Answer :

Volume of cylinder = π × r2 × h


1. r = 10.5 cm, h = 8 cm


Volume = π × r2 × h


= 3.14 × 10.52 × 8


= 2772 cm3


2. r = 2.5 m, h = 7 m


Volume = π × r2 × h


= 3.14 × 2.52 × 7


= 137.5 cm3


3. r = 4.2 cm, h = 5 cm


Volume = π × r2 × h


= 3.14 × 4.22 × 5


= 277.2 cm3


4. r = 5.6 cm, h = 5 cm


Volume = π × r2 × h


= 3.14 × 5.62 × 5


= 492.8 cm3


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