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RRB Assistant Loco Pilot and Technician Model Paper 8 with solutions
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© examsnet.com
Question : 7
Total: 75
If I had walked 1km/hour faster I would have taken 10 minutes less to walk a distance of 2 km. The rate of my walking is
4 km/hour
3 km/hour
6 km/hour
3.5 km/hour
Validate
Solution:
Suppose Speed = x km/h
time taken,
t
1
=
distance
speed
=
2
x
h
if Speed = (x + 1) km/h
then time =
t
2
=
2
x
+
1
h
...(i)
but according to question
time,
t
2
=
(
2
x
−
10
60
)
h
...(ii)
Fromeq. (i) and (ii)
2
x
+
1
=
2
x
−
1
6
2
x
−
2
x
+
1
=
1
6
2
x
+
2
−
2
x
x
(
x
+
1
)
=
1
6
or,
2
x
(
x
+
1
)
=
1
6
or
x
2
+ x = 12
or
x
2
+ x – 12 = 0
or
x
2
+ 4x – 3x – 12 = 0
or x(x + 4) – 3(x + 4) = 0
(x – 3) (x + 4) = 0
∴ x = 3 km/h
© examsnet.com
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