alleryबोटीचा स्थिर पाण्याचा वेग 12 किमी/तास आहे. ते 4 तासात 30 किमी डाउनस्ट्रीम आणि 18 किमी अपस्ट्रीम कव्हर करते. सकारात्मक प्रवाह गती शोधा.
A3 km/h
B2 km/h
C1 km/h
D4 km/h
Answer & Solution
Correct answer: A. 3 km/h
प्रवाह गती x साठी, 30/(12+x) + 18/(12−x) = 4 कमी होते x(x−3)=0;
सकारात्मक समाधान 3 किमी/तास आहे.
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