alleryಸ್ಥಿರ ನೀರಿನ ವೇಗದ 15 ಕಿಮೀ/ಗಂಟೆ ಹೊಂದಿರುವ ದೋಣಿಯು 40 ಕಿಮೀ ಕೆಳಮುಖವಾಗಿ ಹೋಗಿ ಹಿಂತಿರುಗುತ್ತದೆ, ಪ್ರವಾಹವು 5 ಕಿಮೀ/ಗಂಟೆಗೆ ಇರುತ್ತದೆ. ಒಟ್ಟು ಸಮಯ?
A8 ಗಂಟೆಗಳು
B7 ಗಂಟೆಗಳು
C5 ಗಂಟೆಗಳು
D6 ಗಂಟೆಗಳು
Answer & Solution
Correct answer: D. 6 ಗಂಟೆಗಳು
ಡೌನ್ಸ್ಟ್ರೀಮ್ 40 / 20 = 2 ಗಂ ಮತ್ತು ಅಪ್ಸ್ಟ್ರೀಮ್ 40 / 10 = 4 ಗಂ, ಒಟ್ಟು 6 ಗಂಟೆಗಳು.
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