sstrike's answer to Cshjwrk's Primary 6 Maths Measurement Singapore question.

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
sstrike
Sstrike's answer
5608 answers (A Helpful Person)
【Rate - total unchanged】

90:120 = 3:4

3×4u = 4×3u = 12u

90×4u = 120×3u = 90×4×6 = 2160
2×2160 = 4320 (Ans)