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Secondary 1 | Maths
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I need help for Q1(b), thank you!
Date Posted: 4 years ago
Views: 257
We use area scale for such questions.
The length scale is
1 : 750
1 cm : 750 cm
1 cm : 7.5 m
Squaring both sides to find the area scale,
1 cm2 : 56.25 m2
Now we can use the area scale to make area comparisons.
Area on the map
= 58 m2 x 1 cm2 / 56.25 m2
= 1.0311111... cm2
~ 1.03 cm2
The length scale is
1 : 750
1 cm : 750 cm
1 cm : 7.5 m
Squaring both sides to find the area scale,
1 cm2 : 56.25 m2
Now we can use the area scale to make area comparisons.
Area on the map
= 58 m2 x 1 cm2 / 56.25 m2
= 1.0311111... cm2
~ 1.03 cm2
1m² = 10000cm²
By converting cm to metre first in the length scale, we avoid the need for the 1 m2 = 10000 cm2 conversion.
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Hope this helps
Date Posted:
4 years ago
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