can some one solve question 7) iii) and iv) part for me. I have no idea what does Reaching height for 2nd time means in this question. Thankyou .
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s12_qp_43.pdf
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s12_qp_43.pdf