The volume of the frustum of a regular triangular pyramid is 135 cu.m. The lower base is an equilateral triangle with an edge of 9 cm. The upper base is 8 m above the lower base. What is the upper ...
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A cylinder has a height of 10 and a surface area of 78π. Find the radius and volume of this cylinder.
Find the equation of the parabola with directrix x + 1 = 0, axis y = 2, and latus rectum 3.