alleryএকজন কুরিয়ার প্রথম ঘণ্টায় 30 km এবং তারপর পরবর্তী দুই ঘণ্টায় 60 km চালান। গড় গতিবেগ কত?
A40 km/h
B35 km/h
C30 km/h
D45 km/h
Answer & Solution
Correct answer: C. 30 km/h
3 hours-এ 90 km হলো গড়ে 30 km/h।
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