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Question
primary 5 | Maths
| Fractions
One Answer Below
Anyone can contribute an answer, even non-tutors.
Pls assist. Thx
Date Posted: 4 years ago
Views: 502
The unshaded area is the same for both.
Fraction of A that is unshaded
= 1 - 10/11
= 1/11
Fraction of B that is unshaded
= 1 - 4/5
= 1/5
The unshaded area is the same so the units must be the same for the 2 fractions' numerators. (Equal concept)
In this case it's already the same.
1/11 of A = 1/5 of B
Looking at the denominator,
We can say area A is 11 units and area B is 5 units.
The numerator tells us that unshaded area is 1 unit.
Area of whole figure
= Area of A + Area of B - area of overlap
= 11 units + 5 units - 1 unit
= 15 units
Shaded area A = 11 units - 1 unit
= 10 units
Ratio of shaded area A to whole figure
= 10 : 15
= 2 : 3
Fraction of A that is unshaded
= 1 - 10/11
= 1/11
Fraction of B that is unshaded
= 1 - 4/5
= 1/5
The unshaded area is the same so the units must be the same for the 2 fractions' numerators. (Equal concept)
In this case it's already the same.
1/11 of A = 1/5 of B
Looking at the denominator,
We can say area A is 11 units and area B is 5 units.
The numerator tells us that unshaded area is 1 unit.
Area of whole figure
= Area of A + Area of B - area of overlap
= 11 units + 5 units - 1 unit
= 15 units
Shaded area A = 11 units - 1 unit
= 10 units
Ratio of shaded area A to whole figure
= 10 : 15
= 2 : 3
See 1 Answer
done
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clear
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Hope this helps
Date Posted:
4 years ago
That is super clear... thanks AC !!!
I posted a typed explanation in the main comments section, you can check it out as well
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