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Jacob with his mower can mow and trim Mr. Clark's yard in two and a half hours, while Nicole with her mower can mow and trim the same yard in just two. If they work together and stay out of each other's...

A stair-case of length 'L' rests against a vertical wall and a floor of a room. Let P be a point on the stair-case nearer to its end on the wall, that divides its length in the ratio 1:2.If the stair-case...

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