A race course is 400 m long. A and B run a race and A wins by 5m. B and C run over the same course and B win by 4m. C and D run over it and D wins by 16m. If A and D run over it, then who would win and by how much?  Choices
A) D by 7.2 m B) A by 7.2 m C) A by 8.4 m D) D by 8.4 m E) None of these
Explanation :   If D by 7.2 m covers 400m, B covers 395 mIf B covers 400m, C covers 396 mIf D covers 400m, C covers 384 mNow if B covers 395 m, then C will cover(396/400)×395=391.05 mIf C covers 391.05 m, then D will cover(400/384)×391.05=407.24If D by 7.2 m and D run over 400 m, then D win by 7.2 m (approx.)   D by 7.2 mnswer : D by 7.2 m
<result>A</result>
A race course is 400 m long. A and B run a race and A wins by 5m. B and C run over the same course and B win by 4m. C and D run over it and D wins by 16m. If A and D run over it, then who would win and by how much?