quantitative aptitude test 102

Test # 102
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1. A rectangular pool 20 meters wide and 60 meters long is surrounded by a walkway of uniform width.If the total area of the walkway is 516 square meters, how wide, in meters, is the walkway?

Quantitative Aptitude
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contrary to (someone or something)
in spite of something
Contrary to what everybody thought, my friend had already quit his job.
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