Name Geometry MYP Date, (e) Calculate the length of AC in metres. (d) Show that the length of BC is 19.1 metres correct to 3 significant figures. (e) Calculate the volume of the tower. To calculate the cost of air conditioning, engineers must estimate the weight the tower. They estimate that 90% of the volume of the tower is occupied by they know that 1 m³ of air weighs 1.2 kg. (1) Calculate the weight of air in the tower.

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