Question

a coin contains 9 grams of nickel and 16 grand of copper for a total weight of 25 grams what if the percentages the metal in coins is copper

Answer 1

64% of the coin is copper metal.

Answer 2

Answer: 64%

Step-by-step explanation:

Given : A coin contains 9 grams of nickel and 16 grams of copper for a total weight of 25 grams .

i.e. Total weight of coin = 25 grams

weight of copper in a coin = 16 grams

Then , the percentages the metal in coins is copper is given by :-

$\dfrac{\text{Copper in a coin}}{\text{Total weight of a coin}}\times100\\\\=\dfrac{16}{25}\times100\\\\=64\%$

Hence, the percentages the metal in coins is copper = 64%