Question 1122468
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Let x be the number of hours he rides away from home at 28 mph.<br>
Then, since the speed of the automobile is 7 times his walking speed, the number of hours he spends walking is 7x.<br>
Then the total time, which is 2 hours, is equal to x plus 7x, or 8x.<br>
8x = 2  -->  x = 1/4<br>
So the amount of time he spends in the automobile is x = 1/4 hour.<br>
The distance he travels in 1/4 hour at 28 mph is 7 miles.<br>
Answer: 7 miles