alleryA 180 m ரயில் 420 m சுரங்கப்பாதையில் 20 m/s இல் நுழைகிறது. அதை முழுமையாக அழிக்க நேரமா?
A24 s
B30 s
C21 s
D36 s
Answer & Solution
Correct answer: B. 30 s
ரயில் சுரங்கப்பாதையை சுத்தம் செய்ய 180 + 420 = 600 மீ பயணிக்க வேண்டும், 600 ÷ 20 = 30 வினாடிகள் ஆகும்.
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