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Explanation:
[tex]speed : [/tex]
[tex]speed : U = \frac{(90 \times 1000) \: m}{(1 \times 3600) \: s} \\ = 25 \: m {s}^{ - 1} \\ from \: third \: equation \\ {V}^{2} = {U}^{2} + 2aS \\ 0 = {25}^{2} \times (2 \times - 0.5 \times S) \\ 625 = S \\ S = 625 \: m[/tex]