alleryस्थिर उदकांत बोटीचो वेग 12 km/h आसा. बोट 4 hांत प्रवाहाच्या दिशेन 30 km आनी प्रवाहाविरुद्ध 18 km अंतर कापता. प्रवाहाचो धनात्मक वेग सोदून काडात.
A3 km/h
B2 km/h
C1 km/h
D4 km/h
Answer & Solution
Correct answer: A. 3 km/h
हें .
प्रवाहाची गती x खातीर 30/(12+x) + 18/(12−x) = 4 इतली उणी जाता
x(x−3)=0;
सकारात्मक उपाय 3 km/h आसता.
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