A particle starts from rest, acceleration at \( 2 \mathrm{~m} / \mathrm{s} \) for 10 \( s \) and...

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A particle starts from rest, acceleration at \( 2 \mathrm{~m} / \mathrm{s} \) for 10 \( s \) and then goes for constant speed for \( 30 \mathrm{~s} \) and then decelerates at \( 4 \mathrm{~m} / \mathrm{s} \) till it stops. What is the distance travelled by it:
(1) \( 750 m \)
(2) \( 800 m \)
(3) \( 700 \mathrm{~m} \)
(4) \( 850 m \)
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