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A rocket is fired vertically from the gr...

A rocket is fired vertically from the ground. It moves upwards with a constant acceleration `10m//s^(2)` after 30 sec the fuel is finished. After what time from the instant of firing the rocket will attain the maximum height? `g=10m//s^(2)`:-

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The correct Answer is:
89 m

Total distance `=25+36=61 m` covers by both car
`:.` Remaining distance `=150-61=89 m`
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