Question 1149559
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When Wendy left, Monica had been driving 2 hours at 30 km/h, so she had traveled 60 km.<br>
Monica travels 10 km/h faster than Wendy; since she needs to make up 60 km to overtake Wendy, it will take her 60/10 = 6 hours.<br>
Since she drives at 40 km/h, the distance from Montreal at which Monica overtakes Wendy is 4*60 = 240 miles.<br>