Shawn's answer to Rayner Tay's Primary 5 Maths Rate & Ratio Singapore question.
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Alternate method:
Since tap Y takes half the time than tap x, the rate is 2 times of X.
Tap X —> 20 mins
3 Tap X —> 20/3 mins = 6m 40s
Since tap Y takes half the time than tap x, the rate is 2 times of X.
Tap X —> 20 mins
3 Tap X —> 20/3 mins = 6m 40s
Date Posted:
3 months ago
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