HRHRHRHRHR's answer to Rosie's Secondary 3 E Maths Singapore question.

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
HRHRHRHRHR
Hrhrhrhrhr's answer
67 answers (A Helpful Person)
1st
Hi, so answers are (a) 64.9 degrees (b) 25.2m. Refer to the full walkthrough above. Leave a comment if you still need help / clarifications!