during july,vivek went to school for 18 days.it takes him 15 minutes to walk to school and 15 minutes to walk back home.How many hours did he spend walking to and from school that month?
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= per day(15 + 15 ) = 30 Minutes means 1/2 hour per day
He go school 18 days
means 18 *1/2 = 9 hours
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