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A circular garden has a radius of 28 cm. If 80% of the garden is cultivated, what is the area of the part that remains uncultivated?

1. 193.6 cm^2
2. 246.4 cm^2
3. 492.8 cm^2
4. 615.4 cm^2

Correct answer: 492.8 cm^2

Solution

Total area = (22/7) x 28 x 28 = 2464 cm^2. The uncultivated portion is 20% of this, i.e., 0.20 x 2464 = 492.8 cm^2.

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