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Starting from point A, Kashem walked 300 meters towards North to B and then walked another 400 meters towards East to C. What is the shortest distance between C and A?

Starting from point A, Kashem walked 300 meters towards North to B and then walked another 400 meters towards East to C. What is the shortest distance between C and A? Correct Answer 500

Points A, B & C make a right - angled triangle. The shortest distance between C & A is CA. Now,  CA = (AB2  + BC2)1/2  = (3002 + 4002)1/2 = 500 m 

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