Henry Ernest Dudeney/Puzzles and Curious Problems/77 - Out and Home

Puzzles and Curious Problems by Henry Ernest Dudeney: $77$

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Mr Wilkinson walks from his country house into the neighbouring town at the rate of five miles per hour,

and, as he is a little tired, he makes the return journey at the rate of three miles per hour.

As the double journey takes him exactly seven hours, can you tell me the distance from his house to the town?

Sources

• 1932: Henry Ernest Dudeney: Puzzles and Curious Problems ... (previous) ... (next): Arithmetical and Algebraical Problems: Locomotion and Speed Puzzles: $77$. -- Out and Home
• 1968: Henry Ernest Dudeney: 536 Puzzles & Curious Problems ... (previous) ... (next): Arithmetical and Algebraical Problems: Speed & Distance Puzzles: $91$. Out and Home