HELP! I don't understand the formula my teacher wants us to use, so I am just trying to figure it out any way I can!

Question

QUESTION: You are using dirt to fill a planter box, and you use 920 grams of dirt to fill 8 inches of the planter box how many inches can you fill using 48.3 KILOGRAMS of dirt

Answer 1

1st off, David W converted your kg of dirt to grams since that was the

base unit in your original comparison of 920 grams to 8 inches of dirt

 

David W then set up a proportion using  920 is to 8 as 48,300 is to d

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Another way to work this problem is to take the original information

that 920 grams of dirt filled 8 inches and find the "grams per inch"

 

920/8 = 115 grams/inch

 

(48,300 grams)÷(115 grams/inch) will give us the answer

 

48,300/115 = 420 inches 

Answer 2

kilo = 1000

 

48.3(1000) = 48,300 g

 

920/8 = 48,300/d

 

920d = 386,400

d = 420"