Ty D. answered 10/17/18
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If it takes Lin 35 minutes to read 20 pages, it will take her 25 minutes to read 20 more pages:
35 minutes = 20 pages
70 minutes = 40 pages
At 70 minutes (10 minutes past an hour, Lin will have only read 40 pages). She won't be able to complete this book in under 1 hour if she continues to read at the same rate.