5 kg of metal A and 20 kg of metal B...

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5 kg of metal A and 20 kg of metal B are mixed to form an alloy. The percentage of metal A in the alloy is ?

A. 20%

B. 25%

C. 40%

D. None of these

Answer: Option A

Solution(By Examveda Team)

Weight of metal A = 5kg
Total weight of the alloy :
= (5 + 20) kg
= 25 kg
∴ Required percentage :
$$\eqalign{ & = \left( {\frac{5}{{25}} \times 100} \right)\% \cr & = 20\% \cr} $$

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