In a right prism, the base is an equilateral triangle. Its volume is \( 80 \sqrt{3} \mathrm{~cm}...

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In a right prism, the base is an equilateral triangle. Its volume is \( 80 \sqrt{3} \mathrm{~cm}^{3} \) and its lateral surface area is \( 240 \mathrm{~cm}^{2} \). Find its height (in \( \mathrm{cm} \) ).
(a) 10
(b) 5
(c) 15
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