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Distance traveled by each=286/2=143

i) Time for 143-5=138 miles taken by Debbie at 60mph= 138/60
Time for last 5 miles at 70 mph= 5/70
Debbie travels for 138/60+5/70= 2 hrs 22 mins

ii) Time taken by James at 70 mph = 143/70= 2hr 3 mins
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Official Explanation

The correct answers are 2 hours and 22 minutes for Debbie and 2 hours and three minutes for James.

Both Debbie and James travel half of the 286-mile journey, or a total of 143 miles. Debbie travels 138 miles at 60 miles per hour and 5 miles at 70 miles per hour.

For the first miles 138, she travels for 138/60, or 2.3 hours. For the last 5 miles, she travels for 5/70, or 0.071 hours. To convert the decimals to minutes, multiply by 60. She travels 2 hours plus (0.371*60), or 22 minutes.

James travels 143 miles at 70 miles per hour. He travels for 143/70, or 2.043 hours. That is approximately 2 hours and 3 minutes.
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