alleryदो पाइप एक टंकी को क्रमशः 8 और 12 घंटे में भरते हैं। दोनों को 2 घंटे के लिए खोला जाता है, फिर पहले को बंद कर दिया जाता है। दूसरे पाइप को टंकी भरने में और कितना समय लगेगा?
A6 घंटे
B9 घंटे
C7 घंटे
D8 घंटे
Answer & Solution
Correct answer: C. 7 घंटे
2 घंटे में 2 × 5/24 = 5/12 भाग भरता है; शेष 7/12 भाग को 1/12 प्रति घंटे की दर से भरने में 7 घंटे और लगेंगे।
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