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primary 5 | Maths
| Rate & Ratio
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Pls help I am weak in word problem
unshaded area = 17 units
Realise that unshaded area + 2 shaded area = Square A + Rectangle B
17 units + 2 shaded area = 23 units
2 shaded area = 23 units - 17 units
= 6 units
1 shaded area = 6 units ÷ 2 = 3 units
Ratio of shaded area to Square A + Rectangle B before overlapping = 3 : 23
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