Sam earns $10 an hour on Math tutoring. For the first month, he earned $200; and for the second month, he earned $150 more than the first month. How many hours did he spend on tutoring for two months?
For the second month, Sam earned $200 + $150 = $<<200+150=350>>350.
So, he earned a total of $200 +$350 = $<<200+350=550>>550 for the first two months.
Therefore, he spent $550/$10 = <<550/10=55>>55 hours on math tutoring for the first two months
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