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Numerical Ability
Time Distance and Speed
A train started from station 'A' and proceeded towards station 'B' at a speed of 48 Km/hr. Forty-five minutes later another train started from station 'B' and proceeded towards station 'A' at 50 Km/hr. If the distance between the two stations is 232 Km, at what distance from station 'A' will the trains meet?
(a) 160KM
(b) 108KM
(c) 132KM
(d) 144KM
Read Solution (Total 7)
-
- Train A started 45 min ago,by the time train B started,
It means Distance covered by the Train A in 45 min is 48*45/60=36km covered,
now remaining distance=196km
since they are moving towards each other relative speed=48+50=98kmph
and time=196/98=2hrs
In 2hrs trainAcovered 96km distance and 36 km already covered
=>96=36=132km
Hence,132 km from station A, trains meet eachother.
- 8 years agoHelpfull: Yes(42) No(4)
- Distance between A and B =232
Distance covered by A and B is,
(48*x)+(50*(x-(45/60)))=232
Therefore, x=11/4
so,distance covered by A is,
48*x=48*(11/4)=132km
So,ans:c - 8 years agoHelpfull: Yes(18) No(2)
- A's speed-48km/hr.
B's speed-50km/hr.
A's start 45 min before of B's, so distance covered by A=> 48=x/(3/4) (45 min in rational).
x=36KM.
232-36=>196=(48+50)*t, =>196/98=t, =>t=2.
A's speed 48*t=distance, =>96+36(previous covered), =>132KM. - 8 years agoHelpfull: Yes(4) No(0)
- They will meet when sum of the distance covered by them is 232 km
suppose they meet after t hr of departure time at A
then travelling time of B will be t-3/4 hrs
DA=48t
DB=50(t-3/4)
DA +DB= 48t + 50(t-3/4)=232
solving we get t=11/4 hrs
distance from A= 48x11/4=132 km
- 8 years agoHelpfull: Yes(2) No(0)
- suppose they will meet each other after t hrs at a
time taken by b to reach hat distance is t-34
da+db=48t+50(t-34)
t=114 therefore 48(114)=132
they will meet after 132 kms from a
- 8 years agoHelpfull: Yes(1) No(0)
- 108km ; 232-(3/4 *48) = 232-36 =196; 196/(48+50)= 2hrs ; 36+(2*48)=108
- 8 years agoHelpfull: Yes(0) No(2)
- c is the correct answer
- 8 years agoHelpfull: Yes(0) No(0)
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