Vangie Ooi's answer to User's Secondary 1 Maths question.

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
Vangie Ooi
Vangie Ooi's answer
25 answers (Tutor Details)
1st
if you still need answer. The final answer which I didn't include is 31 1/3.