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secondary 2 | Maths
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Nicholas
Nicholas

secondary 2 chevron_right Maths chevron_right Singapore

I need help with this question

Date Posted: 5 years ago
Views: 391

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Shalani
Shalani's answer
1 answers (Tutor Details)
1st
For part (ii), you could also solve it this way, since in part (iii) they're asking you for the answer in km square (so you don't have to convert the numbers a second time):

If 1cm = 500m, and 1km = 1000m,

500m = 500 x 1/1000 = 0.5 km

So now you have a ratio of 1cm : 0.5km

Which you can simplify to whole numbers by multiplying each number by 2, so the ratio now looks like:

2cm : 1 km

Therefore,

28 km ------> 28 x 2 = 56cm
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Bendy
Bendy's answer
57 answers (Tutor Details)
Hope this helps. Added some comments. Do ask if you have any questions