math
posted by davis .
I am having problems coming up with the answer to this problem. Could you kindly help me. It took Amanda 3 hours and 20 minutes to drive from her home to a friend’s house. She
then drove to the beach which took her 4 hours and 25 minutes. It only took Amanda 5
hours and 35 minutes to return home because she took a shortcut. What was Amanda’s
total driving time?

Add:
3 hours, 20 minutes
4 hours, 25 minutes
5 hours, 35 minutes 
3 20/60 + 4 25/60 + 5 35/60
200/60 +265/60 + 335/60
13 1/3 hr
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