A spaceship is moving with a velocity of 100km/s. Its retro-engine fires for 20 sec, such that its velocity reduces to 50km/s. Calculate the distance travelled by the spaceship in 40 seconds, from the time of firing the retro-engine
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it travels with 50km /hr in 40 sec
50 *(5/18)*40
(125/9)*40
5000/9
555.5m
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