Marcus spends 20 minutes giving his dog a bath and half as long blow-drying her. Then he takes her for a walk along a 3-mile trail. If Marcus walks at 6 miles per hour, how much time does he spend with his dog total?
First find the total amount of time Marcus spends blow-drying his dog: 20 minutes / 2 = 
<gadget id="calculator">20/2</gadget>
<output>10</output>
10 minutes.
Then find the time Marcus spends walking: 3 miles / 6 miles/hour = 
<gadget id="calculator">3/6</gadget>
<output>1/2 = around 0.5</output>
.5 hours.
Then convert that time to minutes: .5 hours * 60 minutes/hour = 
<gadget id="calculator">.5*60</gadget>
<output>30</output>
30 minutes.
Then add up the time Marcus spends washing, drying and walking to find the total time: 10 minutes + 20 minutes + 30 minutes = 
<gadget id="calculator">10+20+30</gadget>
<output>60</output>
60 minutes.

<result>60</result>