manvi has a total of rupees 640 as currency notes in the demoni tation rupees 50,20 and 10. the ratio of the number of ruppess 50 notes and rupees 20 notes is 3:5. if she has a total of 30 notes how many notes of each denominatation of each has she?
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a soft metal core made into a magnet by the passage of electric current through a coil surrounding it.
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