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                                    3. An open car is moving on a road with a speed of100 kmh1. A man sitting in the car fires a bulletfrom the gun in the opposite direction. If the speedof the bullet is 250 kmh-1 relative to the car, thenfind its (bullet's) speed with respect to an observer(Ans. 150 kmh-1)on the ground. | 
                            
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Answer»  Velocity of car, u=100 km/hVelocity of bullet in opposite direction, v=250 km/hSince observer is on ground, so ,for him the velocity of bullet will be (v-u) =250-100=150 km/h  | 
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