For a road the free flow speed is 60kmph and jam density is 75veh/km. During a particular time, there are 20 vehicles on a lane over 1 km of road. The average speed at that instant is

44kmph

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36kmph

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30kmph

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40kmph

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Solution

The correct option is A 44kmph
Relation between speed and density is
$U = U_{f} (1 - \frac{K}{K_{j}})$
$U = 60 (1 - \frac{20}{75}) = 44 K m p h$

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For a road the free flow speed is 60kmph and jam density is 75veh/km. During a particular time, there are 20 vehicles on a lane over 1 km of road. The average speed at that instant is

The correct option is A 44kmphRelation between speed and density is U=Uf(1−KKj) U=60(1−2075)=44Kmph

The correct option is A 44kmph
Relation between speed and density is
$U = U_{f} (1 - \frac{K}{K_{j}})$
$U = 60 (1 - \frac{20}{75}) = 44 K m p h$