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SSC Sample Paper Mock Test-3 SSC CGL Tear-II Paper-1

  • question_answer
    If a : b = 2 : 3 and b : c = 4 : 5, find \[{{a}^{2}}:{{b}^{2}}:bc\]

    A)  4 : 9 : 45                     

    B)  16 : 36 : 45

    C)  16 : 36 : 20                  

    D)  4 : 36 : 40

    Correct Answer: B

    Solution :

    a : b = 2 : 3 b : c = 4 : 5 and, a : b = 8 : 12 b : c =12 : 15 \[\therefore \] \[a:b:c=8:12:15\] \[\therefore \]\[{{a}^{2}}:{{b}^{2}}:bc={{8}^{2}}:{{12}^{2}}:15\times 12\] \[=64:144:180=16:36:45\]


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