If the curved surface area of a cylinder is 880 cm², then the product of its height and radius is:

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**Solution:**
**Formula for curved surface area of a cylinder:**
CSA = 2πrh
**Step 1:** Substitute the given value.
2πrh = 880
**Step 2:** Solve for the product of height and radius.
rh = 880 / 2π
rh = 440 / π
rh = 440 / (22/7)
rh = 440 × 7 / 22
rh = 3080 / 22
rh = **140 cm²**
**The product of height and radius is 140 cm².**

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