Q308
Alloy A contains metals x and y only in the ratio 5 : 2 and alloy B contains these metals in the ratio 3 : 4. Alloy C is prepared by mixing A and B in the ratio 4 : 5. The percentage of x in alloy C is:
A.
45
B.
Answer
C.
D.
56
Answer: Option B
Solution
Answer: Option B
Solution:
\begin{array}{*{20}{c}}
{}&x&:&y&{} \\
{A \to }&{{5_{ \times 4}}}&:&{{2_{ \times 4}}}&{ = {7_{ \times 4}}} \\
{B \to }&{{3_{ \times 5}}}&:&{{4_{ \times 5}}}&{ = {7_{ \times 5}}}
\end{array}