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A car has total mass 50 kg. Gases are ej...

A car has total mass 50 kg. Gases are ejected from this car backwards with relative velocity 20 m/s. The rate of ejection of gases is 2 kg/s. Total mass of gas is 20 kg. Coefficient of friction between the car and road is `mu=0.1`

Car will start moving after time t=.......... second.

A

12.2

B

6.4

C

10.6

D

5.8

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