Mathematics · Pipes and Cisterns
समान व्यास वाले 15 पाइप एक टंकी को 12 मिनट में भर सकते हैं। मूल व्यास से दोगुने व्यास वाले 6 पाइपों को उसी प्रवाह की गति से उसी टंकी को भरने में कितना समय लगेगा?
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