allery120 m দৈৰ্ঘ্যৰ এখন ৰে'লে 12 ছেকেণ্ডত এটা টেলিগ্ৰাফৰ খুঁটি পাৰ হয়। ইয়াৰ দ্ৰুতি কিমান?
A32 km/h
B30 km/h
C40 km/h
D36 km/h
Answer & Solution
Correct answer: D. 36 km/h
ই 12 s-ত নিজৰ দৈৰ্ঘ্য অতিক্ৰম কৰে, গতিকে 120 / 12 = 10 m/s, যিটো হ'ল 36 km/h।
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