A car is moving horizontally along a straight line with a uniform velocity of 25 ms-1. A projectile is to be fired from this car in such a way that it will return to it after it has moved 100 m. The speed of the projection must be
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A car is moving horizontally along a straight line with a uniform velocity of 25 ms-1. A projectile is to be fired from this car in such a way that it will return to it after it has moved 100 m. The speed of the projection must be