AC Lim's answer to Athan Darren Koh's Primary 6 Maths Ratio Singapore question.
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Let me know if need more explanation. Hope this helps
Date Posted:
1 year ago
Thank you so much...
Thanl you so much
For speed calculation.
For the same distance = D
Walking take 3 mins
Speed = D/3
Running take 1.25 mins
Speed = D/1.25
Ratio
Run : walk = D/1.25 : D/3
= 1/1.25 : 1/3
All multiply by 3.75 (1.25×3)
= 3 : 1.25
= 300 : 125
All divide by 25
= 12 : 5
For the same distance = D
Walking take 3 mins
Speed = D/3
Running take 1.25 mins
Speed = D/1.25
Ratio
Run : walk = D/1.25 : D/3
= 1/1.25 : 1/3
All multiply by 3.75 (1.25×3)
= 3 : 1.25
= 300 : 125
All divide by 25
= 12 : 5
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