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If the lateral surface area of a cylinder is 320 cm² and its height is 10 cm, what is the radius?

1. 4 π cm
2. 5 cm
3. 16/ π cm
4. 8 cm

Correct answer: 16/ π cm

Solution

The lateral surface area of a cylinder is 2πrh. Substituting 320 = 2π × r × 10 gives r = 16/π cm. So the correct option is 16/π cm.

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