two buses travel to a place at the speeds of 45 km/hr and 60 km / hr respectively . if the second bus takes 7/2 hours less than the first for the same journey , find the length of the journey ?
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Let the length of the journey be x km. Then,
45
x
−
60
x
=
2
11
⇒
180
4x−3x
=
2
11
⇒
180
x
=
2
11
⇒x=
2
11×180
=990km
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