The area of a triangle is 1,440 cm2. The base of the triangle is 5 times the height. What is the height of the triangle?

Let the height be h cm, so the base is 5h cm. Using the triangle area formula, 1,440 = (1/2)(5h)(h) = 2.5h², which gives h² = 576 and h = 24. The height is 24 cm, choice B.

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