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Ramu sells milk after adulterating X litres of pure milk with 0.75 litres of tap water. If he sold milk after adulterating X litres of pure milk with 0.75 litres of mineral water instead, his profit would reduce by 15%.What is the cost of pure milk per litre? (The cost of mineral
water is Rs. 12 per litre and tap water comes for free. Ramu always sells at cost price.)

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a pipe empty a tank in 8 hour . whereas another pipe fill at the rate of 6 liter per minute . if both pipe open together than tank empty in 12 hour . find the capacity of tank??

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35% of a commodity is discounted then its selling price is 26000 if same 15% is discount then what will be the selling price