AC Lim's answer to Leow Wen Ze's Primary 6 Maths Ratio Singapore question.
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Date Posted:
5 years ago
Isn’t 3 men took 22 days?
3 men painted 3u for 1 block in 22days
2 men painted 2u for 1 block in 22days.
Notice 2 men only painted 2/3 of the block in 22 days.
Every 22 days painted 2/3 (2u of total 9u for 3block)
2u —-> 22 days
X4. X4
8u —-> 88 days
1u —-> 11 days
All 9u —-> 99 days
2 men painted 2u for 1 block in 22days.
Notice 2 men only painted 2/3 of the block in 22 days.
Every 22 days painted 2/3 (2u of total 9u for 3block)
2u —-> 22 days
X4. X4
8u —-> 88 days
1u —-> 11 days
All 9u —-> 99 days
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