Jasmine gets off of work at 4:00 pm.  After that, it will take her 30 minutes to commute home, 30 minutes to grocery shop, 10 minutes to pick up the dry cleaning, 20 minutes to pick up the dog from the groomers and 90 minutes to cook dinner when she returns home.  What time will she eat dinner?
Her errands include a 30 min commute and 30 min grocery shopping, 10 min for dry cleaning and 20 min to grab the dog for a total of 30+30+10+20 = <<30+30+10+20=90>>90 minutes
Her errands took 90 minutes and she has another 90 minutes of cooking for a total of 90+90 = <<90+90=180>>180 minutes of chores/errands
60 minutes are in 1 hour and she has 180 minutes of work so that's 180/60 = <<180/60=3>>3 hours
She is off of work at 4:00 pm and has 3 hours of errands/chores so she won't be able to eat until 4+3 = 7:00 pm
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