alleryएक नाव की शांत जल गति 12 km/h है। यह 30 km धारा के अनुकूल और 18 km धारा के प्रतिकूल 4 h में तय करती है। सकारात्मक धारा गति ज्ञात कीजिए।
A3 km/h
B2 km/h
C1 km/h
D4 km/h
Answer & Solution
Correct answer: A. 3 km/h
स्ट्रीम गति के लिए x, 30/(12+x) + 18/(12−x) = 4 कम हो जाता है
x(x−3)=0;
सकारात्मक समाधान 3 km/h है।
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