For The Mathematically Inclined

Problem 2:

The cross-section ABCD of a swimming pool is a right trapezium. Its surface width AB=14 meters, depth at the shallow end is 1.5 meters and at the deep end is 8 meter. How many liters of water can the pool hold when it is completely filled if the length of pool is 20 meters.

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Congratulations to Ramachandran Balakrishna who was the winner of the last set of puzzles.