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primary 6 | Maths
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Date Posted: 4 years ago
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Date Posted:
4 years ago
Thank you very much.
May I know can help me to figure this question? Thank you.
T wants to complete a puzzle. 1st day, she manages to fit 20% of pcs. 2nd day, she fits another 60 pcs. As a result, the ratio of the number of fitted pcs to unfitted pcs becomes 2:5. How many pcs of jigsaw puzzle consist of?
T wants to complete a puzzle. 1st day, she manages to fit 20% of pcs. 2nd day, she fits another 60 pcs. As a result, the ratio of the number of fitted pcs to unfitted pcs becomes 2:5. How many pcs of jigsaw puzzle consist of?
Fitted : unfitted = 2:5, total = 7u
Let all the puzzle piece = 35u (common multiple of 5 and 7)
20% = 20/100 = 1/5
20% = 1/5 x 35u = 7u
Fitted : unfitted = 2:5 (All time x5)
Fitted : unfitted = 10:25 (Total = 35u)
7u+60= 10u (Fitted pieces)
3u = 60
1u = 20
Total pieces= 35u
= 35 x 20
= 700 pieces.
Hope this helps
(You might want to draw model for better visualization of working). If need model let me know.
Let all the puzzle piece = 35u (common multiple of 5 and 7)
20% = 20/100 = 1/5
20% = 1/5 x 35u = 7u
Fitted : unfitted = 2:5 (All time x5)
Fitted : unfitted = 10:25 (Total = 35u)
7u+60= 10u (Fitted pieces)
3u = 60
1u = 20
Total pieces= 35u
= 35 x 20
= 700 pieces.
Hope this helps
(You might want to draw model for better visualization of working). If need model let me know.
I got it, thank you very much and have a nice day.
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