Question
At first, Containers X, Y and Z contained water as shown. Some water from Containers Y and Z was poured into Container X without any spilling over. The volume of water left in Containers Y and Z is shown. What would be the volume of water in Container X?
3 m

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At first, Containers X, Y and Z contained water as shown. Some water from Containers Y and Z was poured into Container X without any spilling over. The volume of water left in Containers Y and Z is shown. What would be the volume of water in Container X?