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Tap P can fill a cistern in 6 hours and tap Q can empty the full cistern in 10 hours. If both taps P and Q are kept open simultaneously, then in how many hours will the empty cistern be completely full ?
After giving three successive discounts of 15%, 5% and p%, respectively, on the marked price of an article of Rs. 4,800, It is sold for Rs. 3,100.80. What is the value of p?
Mr. A bought a laptop with \(16 {{2} \over 3}\) % discount on the labeled price. Had he bought it with 25% discount, he would have saved Rs 600. At what price did he buy the laptop?