3. Starting from rest an object moves with acceleration 25 m/s^2 during 15 sec, then moving with uniform velocity during 20 sec, finally comes to rest with retardation 30 m/s^2. Find the total distance travelled by the object during its whole journey.
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its answer will be (2812.5+7500+2343.75)metres
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mark this the brainliest please
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