Physics p5 urgent

[Daniyal23]

Hey can any one tell me what is the absolute error in this question and how do you find it? q2(b)
http://www.xtremepapers.com/papers/...and AS Level/Physics (9702)/9702_s09_qp_5.pdf
http://www.xtremepapers.com/papers/...and AS Level/Physics (9702)/9702_s09_ms_5.pdf