alleryशांत जल में 15 km/h की चाल वाली एक नाव धारा के अनुकूल 40 km जाती है और वापस लौटती है, जहाँ धारा की चाल 5 km/h है। कुल कितना समय लगेगा?
A8 घंटे
B7 घंटे
C5 घंटे
D6 घंटे
Answer & Solution
Correct answer: D. 6 घंटे
धारा के अनुकूल समय = 40 / 20 = 2 घंटे और धारा के प्रतिकूल समय = 40 / 10 = 4 घंटे, कुल समय = 6 घंटे।
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