10. A tank in the shape of a rectangular prism is 30 cm tall, 60 cm long, and 40 cm wide. First, some rocks were placed at the bottom of the tank. Then 40 liters of water were poured into the tank. At that point, the tank was 3 full. What it the total volume of the rocks? (Recall 1 cubic cm =1 mL, 1000 mL = 1 L) You may leave your answer in liters.

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A: Introduction: The volume of any hemisphere with radius R is V=23πR3.

Cylinders

A cylinder is a three-dimensional solid shape with two parallel and congruent circular bases, joined by a curved surface at a fixed distance. A cylinder has an infinite curvilinear surface.

Cones

A cone is a three-dimensional solid shape having a flat base and a pointed edge at the top. The flat base of the cone tapers smoothly to form the pointed edge known as the apex. The flat base of the cone can either be circular or elliptical. A cone is drawn by joining the apex to all points on the base, using segments, lines, or half-lines, provided that the apex and the base both are in different planes.