Kahwai's answer to Ang Tiong Boon's Primary 6 Maths Measurement Singapore question.
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Base of rectangle
80 x 60
Base of square
40 x 40
Ratio same volume is 3:1 (fill rectangle 1 give square 3)
Then
Original rectangle is 100 x 2/3
Now square is twice the height which mean, rectangle has reduced x then (100 times 2/3 - x) = 2 times (3x)
Solve for x
Solve x you get
80 x 60
Base of square
40 x 40
Ratio same volume is 3:1 (fill rectangle 1 give square 3)
Then
Original rectangle is 100 x 2/3
Now square is twice the height which mean, rectangle has reduced x then (100 times 2/3 - x) = 2 times (3x)
Solve for x
Solve x you get
Date Posted:
3 years ago
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