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A person walks 3 km towards East, then walks 3 km towards South, then walks 7 km towards West and stops. The distance from the starting point and the end pointis (in km)
Let starting point have co ordinates (0,0)
Then finishing point = (-4, 3)
Distance between starting point and finish point = $$\sqrt{\ \left(-4-0\right)^2+\left(3-0\right)^2}$$ = 5
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