alleryA 180 m ರೈಲು 420 m ಸುರಂಗವನ್ನು 20 m/s ನಲ್ಲಿ ಪ್ರವೇಶಿಸುತ್ತದೆ. ಅದನ್ನು ಸಂಪೂರ್ಣವಾಗಿ ತೆರವುಗೊಳಿಸುವ ಸಮಯವೇ?
A24 s
B30 s
C21 s
D36 s
Answer & Solution
Correct answer: B. 30 s
ರೈಲು ಸುರಂಗವನ್ನು ತೆರವುಗೊಳಿಸಲು 180 + 420 = 600 ಮೀ ಪ್ರಯಾಣಿಸಬೇಕು, 600 ÷ 20 = 30 ಸೆಕೆಂಡುಗಳನ್ನು ತೆಗೆದುಕೊಳ್ಳುತ್ತದೆ.
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