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harid
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latif buys an article and sells it to raza at gain of 25%.raza sells the article to rashid at a gain of 20%.how much money does
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if 9 men need 15 days to complete a task, how many days would it take to complete this task if 3 additional men were employed
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wavelength is 30m frequency is 100 Hz phase difference is 540 degrees
