A ship goes along a river and returns in time \( t_{0} \) at a speed 2 \( \mathrm{m} / \mathrm{s...

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A ship goes along a river and returns in time \( t_{0} \) at a speed 2 \( \mathrm{m} / \mathrm{s} \). On a particular day, a uniform current at speed \( 1 \mathrm{~m} / \mathrm{s} \) is present to help the onward journey and oppose the return journey. If the time taken to go along and return on the rough day be \( t \), then find the value of \( t / t_{0} \).
(a) \( \frac{3}{4} \)
(b) \( \frac{4}{3} \)
(c) \( \frac{5}{4} \)
(d) \( \frac{1}{2} \)
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