My question is: Johnny is a dog walker. He can walk 3 dogs at once. He gets paid $15 for a 30-minute walk and $20 for a 60-minute walk. Johnny works for 4 hours per day. If he always walks the maximum number of dogs possible and 6 dogs have 60-minute walks per day, how much money does he make in a week where he works 5 days? Your thoughts:
Johnny spends 6 / 3 = 2 hours walking the 6 dogs who have 60 - minute walks. He makes $20 * 6 = $120 for these walks. Thus, he has 4 - 2 = 2 hours = 120 minutes left to walk the other dogs. He can walk 3 * (120 / 30) = 12 dogs in this time. Thus, he will make $15 * 12 = $180 on these walks. In total per day, he makes $120 + $180 = $300 per day. Thus, during the week, he makes $300 * 5 = $1500. The final answer: 1500.