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Volume of smaller block A = 16x2x10 = 320 cm3

Volume of larger block B = 20x2x10 = 400 cm3

Volume of T-blocks A+B = 720 cm3

Number of completely filled T-blocks = 5616/720 = 7.8 = 7

Volume of 7 T-blocks = 7 x 720 = 5040 cm3

Remaining water = 5616 – 5040 = 576 cm3

So the remaining water will fill 1 large block B of 400 cm3, leaving 176 cm3 in the smaller block A.

Height of 176 cm3 water in smaller block A = 176/Area = 176/(16×10) = 1.1 cm

Hence water level = Height of 7 T-blocks + 1 larger block B + 1.1

= 7×4 + 2 + 1.1

= 31.1cm

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