QP's answer to Eunice Li's Primary 5 Maths Singapore question.
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First, make it a common number between the denominator & ratio for A’s area.
6 : 21
From here, you know area A & area B make up a total of 27units.
Overlapped (shaded area) is 4units so 4x2=8 units to subtract the overlapped area by rectangle B as well.
6+21-4-4= 19
19u -> 95cm^2
19u+4u=23u (only add 4u since they are overlapped)
23u -> 115cm^2
6 : 21
From here, you know area A & area B make up a total of 27units.
Overlapped (shaded area) is 4units so 4x2=8 units to subtract the overlapped area by rectangle B as well.
6+21-4-4= 19
19u -> 95cm^2
19u+4u=23u (only add 4u since they are overlapped)
23u -> 115cm^2
Date Posted:
1 month ago
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