1.5u + 1u = 2.5u
2.5u = 45cm
3u = 45/2.5 x 3 = 54cm
54 x 45 = 2430cm2
6 years ago
Chee Weng Tang
using laymen terms: 1 long side plus 1 short side = 45 cm. So, 2 long plus 2 short equals 90 cm.Then see that 2 long sides equals 3 short sides. Then that means 5 short sides equals 90 making 1 short side 18cm thus the long side is 27cm. Last step to find area is the same as mike tan's last step.
6 years ago
Fabio Lim
Thanks a lot
6 years ago
Sing Tien Loo
Asked 9 years ago
SG
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Primary 5
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Number and Algebra
Need help with this P5 question. Do I need to draw a model for this type of question? Thanks in advance!
Replies
10
Kai Meng
u+14=3x(u+2)
6 years ago
Sing Tien Loo
Thanks Kai Meng!
6 years ago
Beng Ti Tan
Model Method
6 years ago
Sing Tien Loo
Thanks Beng! This helps in my explanation to my kid!
6 years ago
Beng Ti Tan
Sorry Rajesh I could only solve this one by algebra. I will try and think of another method.
My boy's P6 past year question.. pls help. Thanks in advance.
Replies
1
Kai Meng
Length of each shaded rectangle is 9, so breadth is 24/2-9=3.
Area of each shaded rectangle is 3*9=27.
Area of each big rectangle is 9*15=135.
Area of unshaded is 5*135 - 8*27.
6 years ago
Allison Chin
Asked 9 years ago
SG
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Primary 6
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Number and Algebra
P6 past year question, pls help... Thanks in advance.