To make 3 km, Ben walked for 2 hours. Continuing at the same speed, how much time in minutes would it take him to travel 12 km?
We have 12 km / 3 km = 
<gadget id="calculator">12/3</gadget>
<output>4</output>
4. So, the distance covered in 12 km is 4 times greater than 3 km. The time taken will also be 4 times greater.
So, 2 hours x 4 = 
<gadget id="calculator">2*4</gadget>
<output>8</output>
8 hours.
We convert the time to minutes: 8 hours * 60 minutes/hour = 
<gadget id="calculator">8*60</gadget>
<output>480</output>
480 minutes.

<result>480</result>