3.2 The diagram below shows a rectangular prism-shaped water troug concrete Outer dimensions trough length = 3 m width =685 mm height = 40 cm [1 (litre) = 1000 cm³] 3.2.1. Calculate, in cm, the volume of concrete used to make the water trough if the trough can hold a maximum of 485 (water. (7) 3.22. A cow drinks 56 ! water per day. Zipho states that a full trough has enough water for 8 cows per day. Verify with calculations whether this statement is correct. (4)​