Find the time needed at 40 m/min. Compare with 25 min. If too slow, find required speed.<br><br>
&bull; 1.2 km = 1200 m<br>
&bull; Time at 40 m/min = 1200 ÷ 40 = 30 min<br>
&bull; 30 min &gt; 25 min, so he will be late<br>
&bull; Required speed = 1200 ÷ 25 = 48 m/min<br><br>
Final Answer: 48 m/min