alleryএকটি 100 m দৌড়ে A-এর 20 s এবং B-এর 25 s সময় লাগে। A যখন দৌড় শেষ করে তখন B কত পেছনে থাকে?
A25 m
B10 m
C15 m
D20 m
Answer & Solution
Correct answer: D. 20 m
B 4 m/s বেগে দৌড়ায়, সুতরাং 20 s-এ সে 80 m অতিক্রম করে এবং 20 m পেছনে থাকে।
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