Question

An alloy contains Tin and copper , 15 parts are of tin and copper consists of 105 parts find the percentage of copper in the alloy

Answer 1

Let the percentage of copper be x.
we can say that,
$\\ x percent of (15+105) = 105 \\ (x/100) 120 = 105 \\ x = 87.5%$
So, Percentage of copper is 87.5%

Answer 2

Here is your Solutions :-

Given :

Tin = 15 parts
Copper = 105 parts

Alloy of tin and copper = (15 + 105) = 120

Now,

Find the Percentage of copper in alloy :-

% of copper​=105/120×100​% = 87.5%​ 

Hence,
Percentage of copper is 87.5 % in alloy.

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