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A took 15 seconds to cross a rectangu...

`A` took 15 seconds to cross a rectangular field diagonally walking at the rate of 52 m/min and `B` took the same time to cross the same field along its sides walking at the rate of 68 m/min. The area of the field is (a) 30m2 (b) 40m2 (c) 50m2 (d) 60m2

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