TIEW KAI JIE NICHOLAS's answer to katie's Primary 4 Maths Singapore question.

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TIEW KAI JIE NICHOLAS
Tiew Kai Jie Nicholas's answer
107 answers (Tutor Details)
1 length of rectangle + 1 breadth of rectangle = width of carpet.
1L + 1B = 80cm
From the layout of the carpet, 4 breadths of the rectangle makes up 1 length of the rectangle.
1L = 4B
4B + 1B = 80cm
5B = 80cm
1B = 16cm
12B = Length of carpet.
12B = 16 x 12cm = 192cm
Total perimeter of carpet
= 192 + 192 + 80 + 80
= 544cm