alleryএখন নাও নিশ্চল পানীত ঘণ্টাত 12 কিলোমিটাৰ বেগত গতি কৰে; ধাৰাটোৰ গতিবেগ প্ৰতি ঘণ্টাত 3 কিলোমিটাৰ। 27 কিলোমিটাৰ তললৈ আৰু পিছলৈ যোৱাৰ সময়?
A4 h
B4.5 h
C4.8 h
D5 h
Answer & Solution
Correct answer: C. 4.8 h
তলৰ আৰু ওপৰৰ সময় 27/15 আৰু 27/9 ঘন্টা, মুঠ 4.8 ঘন্টা।
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