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secondary 3 | E Maths
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Kathy
Kathy

secondary 3 chevron_right E Maths chevron_right Singapore

Tyty

Date Posted: 5 years ago
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Eric Nicholas K
Eric Nicholas K's answer
5997 answers (Tutor Details)
1st
An easier way to approach is

Length difference from 12 cm to 15 cm is 3 cm.
Corresponding height difference is 10 cm.

So 10 cm height --> 3 cm length
4 cm height --> 1,2 cm length

So x = 12 + 1.2 = 13.2 cm.