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An object was launched from a place P in...

An object was launched from a place P in constant speed to hit a target. At the `15^(th)` second it was 1400m away from the target and the `18^(th)` second 800m away. Find
the distance covered by it in 15 seconds.

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The correct Answer is:
`D=1400m`
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PREMIERS PUBLISHERS-TWO DIMENSIONAL ANALYTICAL GEOMETRY-SOLUTION TO EXERCISE (6.2)
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