alleryস্থির জলে একটি নৌকার গতিবেগ 12 km/h এবং স্রোতের গতিবেগ 3 km/h। স্রোতের অনুকূলে এর গতিবেগ কত?
A9 km/h
B15 km/h
C18 km/h
D12 km/h
Answer & Solution
Correct answer: B. 15 km/h
স্রোতের অনুকূলে স্রোত সাহায্য করে, 12 + 3 = 15 km/h।
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