To find: The distance covered on the boardwalk.
The distance covered on the boardwalk is 720 ft.
Distance between boardwalk and shoreline is 210 ft. Distance between man and umbrella is 750 ft.
The man walks 4 ft/s on boardwalk and 2 ft/s on the sand.
Time taken to reach the umbrella is exactly 4 min 45 sec.
Let the distance covered on the boardwalk be x.
Time taken to reach the umbrella in sec is,
Tabulate the given information algebraically.
|In words||In algebra|
|Length of boardwalk||x|
Model the equation for the above information.
On further simplification,
The distance covered on board walk is 720 ft.
Time taken to walk through the board-walk to a point directly in front umbrella is,
Thus, the distance cover on the boardwalk is 720 ft.
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