Qr

[jdpaul14]

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Does anyone know how to solve this QR problem?

Thanks

Q: How many gallons of pure orange pulp must be added to 30 gallons of a 20% solution of orange pulp to make it a 50% solution?

 

[joonkimdds]

Does anyone know how to solve this QR problem?

Thanks

Q: How many gallons of pure orange pulp must be added to 30 gallons of a 20% solution of orange pulp to make it a 50% solution?

(30*0.2)/(30+x) = (0.5)(30+x)
I think this is the correct way to set up.

 

[jdpaul14]

doesn't that set up a quadratic?

 

[dfymarine]

the answer should be 18


since 20% of 30 is 6 gallons of pure pulp

so in order to make 50%, you gotta add more pure pulp into this 6 gallons

6 +x = you will add should be equal to 50% ( 30 gallons + you add)

so, 6+x = 50% (30 +x)

x = 18

 

[jdpaul14]

Thank you both 🙂