Question

1 The metal used to make a coin is a mixture of steel and copper. The ratio mass of steel

: mass of copper is 108 :7. The coin has a total mass of 230 milligrams.
Calculate the mass of copper in this coin.
uene

Answer 1

`\huge{ \underline{ \underline{ \gray{ \bf{Solution:}}}}}`

Let,

• Mass of the steel be 108x
• Mass of the copper be 7x
• Then, Total mass = 108x + 7x = 115x

Given,

• Total mass of the coin = 230 mg

That means,

⇛ Total mass of the coin = 230 mg

⇛ 115x = 230 mg

⇛ x = 230 mg/115

⇛ x = 2 mg

Then,

• Mass of the steel = 108(2) = 216 mg
• Mass of the copper = 7(2) = 14 mg

☁️ ANSWER - 14 mg (Mass of copper)

━━━━━━━━━━━━━━━━━━━━