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Banking Sample Paper RRB Officer (Main) Sample Test Paper-1

  • question_answer
    30 kg of alloy P is mixed with 90 kg of alloy Q. If alloy P has lead and tin in the ratio of2:3 and alloy Q has tin and copper in the ratio of 1 : 4 the amount of tin in the new alloy is

    A)  30 kg               

    B)  37 kg   

    C)         42 kg   

    D)         40 kg

    E)  50 kg

    Correct Answer: A

    Solution :

    Alloy P - Lead : Tin\[=2:3\] \[\therefore \]      Tin\[=\frac{2}{5}\times 30=12\,\,kg\] Alloy Q - Tin : Copper = 1 : 4 \[\therefore \]      Tin\[=\frac{1}{5}\times 90=18\,\,kg\] Total amount of Tin in the new alloy \[=18+12=30\,\,kg\]


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