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Pipes A, B and C can fill a tank in 10, 15 and 30 hours, respectively. D is an emptying pipe which alone can empty the full tank in x hours. A, B and C are opened together for 3 hours and then closed. Now D is opened which alone empties the tank in 30 hours. What is the value of x?
Red Data Bookes are compiled by: लाल आंकड़े संबंधी पुस्तकें संकलित की जाती हैं:
प्रधानमंत्री मुद्रा योजना का क्या उद्देश्य है?
Choose the group of letters which is different from others:
हाल ही में, भारतीय रिजर्व बैंक (RBI) ने किस बैंक पर नियमों का पालन न करने पर 15 करोड़ रुपये का जुर्माना लगाया है?
In which method of stone dressing, a 20 mm wide margin is made along the edges of the stone and irregular sinking about 10 mm wide & 5 mm deep are marked in the interior portion?
भारत में यौन-अनुपात है-
Explanations:
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