Reduce by 80% means the new speed is 20% of the original.<br><br>
&bull; New speed = 60 × 0.20 = 12 km/h<br>
&bull; 25 min = \( \frac{25}{60} = \frac{5}{12} \) h<br>
&bull; Distance = 12 × \( \frac{5}{12} \) = 5 km<br><br>
Final Answer: 5 km