Karen can read 10 pages and complete 15 math problems in 30 minutes, so on average, it takes her 30/10 = <<30/10=3>>3 minutes to read 1 page.
Similarly, it takes her 30/15 = <<30/15=2>>2 minutes to complete 1 math problem.
Therefore, it would take Karen 3 * 25 = <<3*25=75>>75 minutes to read 25 pages.
It would also take her 2 * 35 = <<2*35=70>>70 minutes to complete 35 math problems.
Therefore, it would take Karen 75 + 70 = <<75+70=145>>145 minutes to read 25 pages and complete 35 math problems. Answer: \boxed{145}.
Karen can read 10 pages and complete 15:math problems in 30 minutes, how long
1 answer