- 40%
- 500%
- 4000%
- 440%

Option 2 : 500%

**Formula used:**

Volume of cylinder = πr^{2}h

**Calculation:**

Let the original radius be r and height be 8h.

Original volume = πr^{2}8h

Changed radius = 4r

Changed height = 3/8 × 8h = 3h

Changed volume = π16r^{2}3h = 48πr^{2}h

Change in volume = 48πr^{2}h – 8πr^{2}h = 40πr2h

% change = (40πr2h/8πr2h) × 100 = 500%

**∴ The change will be 500%**

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