alleryপাহাড়ে ওঠার সময় একটি লরির গড় গতিবেগ 20 km/h এবং একই রাস্তা দিয়ে নিচে নামার সময় 30 km/h। পুরো যাত্রার গড় গতিবেগ কত?
A22 km/h
B25 km/h
C24 km/h
D26 km/h
Answer & Solution
Correct answer: C. 24 km/h
সমান দূরত্ব থেকে পাওয়া যায় 2 x 20 x 30 / 50 = 24 km/h।
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