John drives from town A to town B at speed of 60 mph. After two hours, Mark leaves town A for town B at a speed of 75 mph. How much time does Mark take to reach town B if both of them reach town B at the same time?
Question
John drives from town A to town B at speed of 60 mph. After two hours, Mark leaves town A for town B at a speed of 75 mph. How much time does Mark take to reach town B if both of them reach town B at the same time?
Solution
Step 1: Determine how far John has traveled when Mark starts his journey.
John travels at 60 mph for 2 hours, so he covers a distance of 60 mph * 2 hours = 120 miles.
Step 2: Determine how long it takes Mark to cover the same distance.
Mark travels at a speed of 75 mph. To find out how long it takes him to travel 120 miles, divide the total distance by his speed: 120 miles / 75 mph = 1.6 hours.
So, Mark takes 1.6 hours to reach town B after he starts his journey.
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