Question

A coin contains 999 grams of nickel and 161616 grams of copper, for a total weight of 252525 grams. What percentage of the metal in the coin is copper?

Answer 1

percentage of metal in the coin is copper = 161616/252525 times 100%
= 64%

Answer 2

Given:

(i) The coin contains 999gm of Nickel.

(ii) It also has 161616gm of Copper.

(iii) The total weight of the coin is 252525gm.

To find:

(i) Percentage of copper by weight in the coin

Solution:

To find the required percentage of copper by weight in the coin, we do it by

Percentage = $(\frac{Weight of copper in coin * 100}{Total weight of the coin})$%

= $\frac{16161600}{252525}$%

= 64%

The required percentage of copper in the coin is 64%.