8 The map for a park is shown alongside, where each grid unit represents 10 m. A large tent is to be constructed on the park for a festival. It will be a rectangular-based pyramid with base ABCD indicated on the map. The apex of the tent is 15 m above the centre of the base. y (m) B 150 C 100 a Suppose ground level has Z-coordinate 0. Find the 3-dimensional coordinates of: i each corner of the base ii the apex of the tent. b Find the volume of air inside the tent. c Find the amount of material needed for the tent. Do 50 A not include the floor. (u) x 50 100

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