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Q. A bottle is filled 10% in one hour and 8% of the water is emptied in the next one hour. If this process is repeated once again, find the percentage of the bottle filled with water.

Q. एक टैंक को एक घंटे में 10% भरा जाता है और अगले एक घंटे में इसमें से 8% पानी को खाली कर दिया जाता है। यदि यह प्रक्रिया एक बार फिर दोहराई जाती है, तो टैंक का कितना प्रतिशत भाग पानी से भरा होगा।

A

5.67%
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B

11.48%
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C

17.66%
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D

20.51%
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Solution

The correct option is C
17.66%
The bottle will be filled 10% in the first hour. In the next hour, 8% of it. i.e. 10 ×(8100)=0.8% of the bottle is emptied. The remaining water after the second hour is 9.2%. Again, in the third hour 10% bottle is filled, it becomes 19.2%. Now, Again 8% of it. i.e 19.2 ×(8100)=1.536% is emptied in the fourth hour so the remaining water is 19.21.536=17.66%

पहले घंटे में टंकी का 10% भाग भरा जाएगा। एवं, इसके अगले एक घंटे में इसका 8% अर्थात, 10 ×(8100)=0.8% भाग खाली होगा। दूसरे घंटे के बाद इसमें 9.2% पानी बचेगा।फिर, तीसरे घंटे में 10% बोतल भरी जाती है, अर्थात, यह 19.2% हो जाता है। पुनः चौथे घंटे में इसका 8% अर्थात 19.2 ×(8100)=1.536% खाली हो जाता है, इसलिए शेष पानी 19.21.536=17.66% है।

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