Question

In a particular type of bronze, 25% is zinc and the rest is copper. Find the amount of copper in
261 kg of such type of bronze​

Answer 1

Answer:

100%-25%=75%

So, the type of bronze is made up of 75% of copper

75/100×261kg

= 3/4×261

3× 65.25

= 195.75kg or 195 kg and 75 grams

Answer 2

Step-by-step explanation:

Let the proportion of Copper and Zinc in Brass be x:y

Also, let the amount of brass and bronze in the fused mass is m and n respectively

Percentage of Tin in the fused mass =m×0+n×16=(m+n)×10⟹10m=6n⟹

m 3

__ =__

n 5

Percentage of Zinc in the fused mass =m×y+n×4=(m+n)×16⟹(y−16)m=12n⟹

12 m 3

___=___=___

y−16 n 5

⟹3y−48=60⟹y=36

Also, x+y=100⟹x=64

Therefore Ratio of Copper and Zinc in Brass is 64:36