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Can you please answer this quickly extra points given please answer 11 and 12

Can you please answer this quickly extra points given please answer 11 and 12-example-1
User Suman Lama
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20:30 ration but I'm guessing you need it in simpliest form:
2:3 if you divided by 10
Next question: d=rx2
it would be 40 - 50 not 60 to 50.

User Golamrabbi Azad
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