Based on the given information, Karen can complete 1 page of reading in 30/10 = <<30/10=3>>3 minutes.
Therefore, she will take 30 x 3 = <<30*3=90>>90 minutes to complete the 30 pages reading.
Karen can complete 1 math problem in 30/15 = <<30/15=2>>2 minutes.
Therefore, she will take 45 x 2 = <<45*2=90>>90 minutes to complete the 45 math problems.
Hence, it will take Karen 90 + 90 = <<90+90=180>>180 minutes to complete her homework. Answer: \boxed{180}.
Karen can read 10 pages and complete 15 math problems in 30 minutes. How long will it take her to do her homework if she has 30 pages to read and 45 math problems to complete? Your answer should refer to the amount of time in minutes.(
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