Question

An alloy is made from 35% nickel, 30%
zinc and rest copper. Find the weight
of copper in 1050 g of the alloy.​

Answer 1

Answer:

147%

Step-by-step explanation:

% of copper = 100-(35+30) = 35%

=35% of 1050 = 35/100*1050

=147%

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Answer 2

To Find:

• The weight of copper in 1050 g of alloy.

Solution:

Given,

Percentage of nickel = 35%

Percentage of zinc = 30%

Rest is copper = ( 100 - 35 - 30 )%

= ( 100 - 65 )%

= 35%

Method 1

➦ 35/100 × 1050

➦ 0.35 × 1050

➦ 367.5 g

∴ Copper weights 367.5 g

Method 2

Sum of the percentage of nickel and zinc

= ( 35 + 30 )%

= 65%

The weight of nickel and zinc

➦ 65/100 × 1050

➦ 0.65 × 1050

➦ 682.5 g

∴ Total weight of alloy - Weight of nickel and zinc

➦ 1050g - 682.5g

➦ 367.5 g

Now, Verification

➦ 682.5 + 367.5 = 1050

➦ 1050 = 1050

Required Answer:

• The weight of copper is 367.5g.