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An alloy contains two metals in the ratio 7 : 3. If the difference between weights of two metals is 360 gm then how much does the alloy weigh?
1. 1900 gm
2. 800 gm
3. 900 gm
4. 1100 gm

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Correct Answer - Option 3 : 900 gm

Given:

An alloy contains two metals in the ratio 7 : 3.

Difference between weights of two metals is 360 gm.

Calculation:

Let weight of two metals be 7x and 3x

Then 7x - 3x = 360 gm

⇒ 4x = 360 gm

⇒ x = 90 gm

∴ Weight of alloy = 7x + 3x = 10x

= 10 × 90 = 900 gm.

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