alleryएक नाव शांत पानी में 12 km/h की गति से चलती है; धारा 3 km/h है। 27 km धारा के अनुकूल और वापसी का समय?
A4 h
B4.5 h
C4.8 h
D5 h
Answer & Solution
Correct answer: C. 4.8 h
डाउनस्ट्रीम और अपस्ट्रीम समय 27/15 और 27/9 घंटे हैं, कुल मिलाकर 4.8 घंटे।
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