alleryএকটি ট্রাম একটি রুটের এক-তৃতীয়াংশ 20 km/h গতিবেগে এবং বাকি দুই-তৃতীয়াংশ 40 km/h গতিবেগে অতিক্রম করে। এর গড় গতিবেগ কত?
A30 km/h
B35 km/h
C28 km/h
D32 km/h
Answer & Solution
Correct answer: A. 30 km/h
একটি 60 km রুটের জন্য, 20 km যেতে 1 h এবং 40 km যেতে 1 h সময় লাগে, যা দেয় 60 / 2 = 30 km/h।
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