Canadian 10¢ and 25¢ coins are made of pure nickel which has a density of 8.902 g/cm3. Suppose each dime weighs 2.12 g and each quarter weighs 5.30 g. A small collection of dimes and quarters are submerged in 10.00 mL of water in a graduated cylinder causing the water level to rise to the 20.24 mL mark. What is the combined monetary value (in Can$) of those coins?
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10.00 mL of water rose to the 20.24 mL = 10.24 mls of coins
10.24 ml @ 8.902 g/ml = 91.156 grams of coins
dimes = 2.12 grams /10 cents = 0.212 g pr cent
quarters = 5.30 grams / 25 cents = 0.212 g /cent
regardless of the coin, their monetary value is 0.212 g/cent
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91.156 grams of coins @ 0.212 g/cent = 430 cents
your answer is $4.30