How much time was required? A current of 1 point 8 cap A delivers 2 point 5 cap c of charge.

Use the relationship charge = current × time, so time = charge ÷ current. Substituting the values gives 2.5 C ÷ 1.8 A ≈ 1.39 s, which rounds to 1.4 s. Therefore, the correct choice is 1 point 4 s.

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