alleryএকটি 200 m রেসে A বীট B by 20 m। A 10 m/s এ চলে। B এর গতি কত?
A8 m/s
B9 m/s
C8.5 m/s
D9.5 m/s
Answer & Solution
Correct answer: B. 9 m/s
A 20 সেকেন্ডে শেষ হয়, যার সময় B কভার করে 180 m, দেয় 9 m/s।
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