Question
CIVICS > ELECTION_COMMISSION
1) A train 360 m long is running at a speed of 45 km/hr. In what time will it pass a bridge 140 m long ?
A) 40 secB) 42 sec
C) 45 secD) 48 sec
View Answer        RRB_JE_2014_Answer-key
Answer : 40 sec

egin{aligned} ext{L1 = 360 m}\ ext{L2 = 140 m}\ ext{S = 45 }frac{km}{hr} ext{ = }frac{45*5}{18}frac {m}{s}\ ext{T = }frac{left(360+140 ight)}{left(frac{25}{2} ight)} sec\ ext{T = } left(frac{500 * 2}{25} ight)\ ext{T = 40 sec} end{aligned}



ANUSHA Says on 15/08/2015 11:10:20 pm :



ANUSHA Says on 15/08/2015 11:11:20 pm :

GOOD ANSWERS


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