AC Lim's answer to Tyler soliven's Primary 6 Maths Measurement Singapore question.

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AC Lim
Ac Lim's answer
12085 answers (A Helpful Person)
1st
Ratio L:M = 8:11
50%= ½, therefore L left 4
If L left 4, M should be 8
L:M=4:8
Hence, M = 11u-8u=3u
3u=30
1u=10
Total at first = 8u+11u=19u
= 19×10
=$190
Hope this helps