Question 988322
All we know from information given is that Mrs. Jones did not finish the trip in 2 hours, so the speed was less than 152mi/2hr=76mph. And since the speed was reduced by 10mph, we know the speed was greater than 10mph.
As given, the original speed can be anywhere between 10mph and 76mph.
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ANSWER: 10mph < original speed < 76mph