UPSC Government Jobs Exams Logical Reasoning Mathematical Reasoning

Running at a speed of 60 km per hour, a train passed through a 1.5 km long tunnel in two minutes. What is the length of the train? [UPSC 2010 (CS-P)]
1) 250 m
2) 500 m
3) 1000 m
4) 1500 m

Read Solution (Total 6)

D/S=T
(x+1.5)/60=2/60
x=0.5km
10 years agoHelpfull: Yes(1) No(1)

500m. s=d/t
10 years agoHelpfull: Yes(1) No(0)
1500+x/(60*5/18)=120
so, x=500m ans.
10 years agoHelpfull: Yes(1) No(1)
500m d/s=t (x+1.5)/60=2/60=0.5km
8 years agoHelpfull: Yes(0) No(0)
ans 500m since a point object will pass the bridge in 90sec i.e., only 30 sec will be required to cover the distance of whole train so that is we use 30 sec * 60kmph gives 500m as train's lenght
7 years agoHelpfull: Yes(0) No(0)
ans is 500
6 years agoHelpfull: Yes(0) No(0)

UPSC Other Question

P, Q, R and S are four men. P is the oldest but not the poorest. R is the richest but not the oldest. Q is older than S but not than P or R. P is richer than Q but not than S. The four men can be ordered (descending) in respect of age and richness, respectively, as: [UPSC 2010 (CS-P)]
1) PQRS, RPSQ
2) PRQS, RSPQ
3) PRQS, RSQP
4) PRSQ, RSPQ Six books, A, B, C, D, E and F are placed side by side. B, C and E have blue cover and the other books have red cover. Only D and F are new books and the rest are old. A, C and D are law reports and other are Gazetteers. What book is a new law report with a red colour?
Which of the statements given above is/are correct? [UPSC 2010 (CS-P)]
1) A
2) B
3) C
4) D