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primary 5 | Maths | Percentage
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Nicole
Nicole

primary 5 chevron_right Maths chevron_right Percentage chevron_right Singapore

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Date Posted: 4 months ago
Views: 47
J
J
4 months ago
length PQ = 3 units, breadth PS = 2 units

2 units = 28cm
1 unit = 28cm ÷ 2 = 14cm

PQ = 3 units = 14cm x 3 = 42cm

Or

If breadth is ⅔ of length, then length is 3/2 of breadth.

So PQ = 14cm x 3/2 = 42cm


TU = 1/6 of PQ
= 1/6 x 42cm
= 7cm

Height of shaded triangle
= 28cm - TU
= 28cm - 7cm
= 21cm

Area of shaded triangle
= ½ x base x height
= ½ x 42cm x 21cm
(since base is same as length of rectangle)
= 441cm²

Area of rectangle
= Length x breadth
= 42cm x 28cm
= 1176cm²

Unshaded area

= Area of rectangle - area of shaded triangle

= 1176cm² - 441cm²
= 735cm²

See 2 Answers

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AC Lim
Ac Lim's answer
3178 answers (A Helpful Person)
1st
Hope this helps
J
J
4 months ago
The TU is 1/6 of the length PQ instead of the breadth. So the height of the triangle would be 28cm - 7cm = 21 cm instead
AC Lim
AC Lim
4 months ago
Thanks J for highlighting the mistake
J
J
4 months ago
No problem
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AC Lim
Ac Lim's answer
3178 answers (A Helpful Person)
Hope this helps