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Assume all the rows have an equal number of seats

Each row has 10 + 1 + 11 seats = 22 seats.

There are 8 + 1 + 12 rows = 21 rows

So there are 22 * 21 = 462 seats # altogether.

 

Volume of smaller tank = 12 * 6 * 8 = 576 cm³

Volume of water in cubical tank = 1/3(18) * 18 * 18 = 1944 cm³

Volume of water left in cubical tank = 1944 – 576 = 1368 ml #

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