Question
The inner radius of a hollow cylindrical tank is 6 cm. If
the height of the tank and the thickness of the walls are 25 cm and 3 cm, respectively, calculate the volume of the tank. (Use π = 22/7)Solution
ATQ,
Outer radius of the tank = 6 + 3 = 9 cm
Volume of the hollow tank = π × height × [(outer radius)² - (inner radius)²]
= (22/7) × 25 × (9² - 6²)
= (22/7) × 25 × (81 - 36)
= (22/7) × 25 × 45
= 1,785 cm³
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