New RBI Grade B 2025 Notification will come Soon! Enroll Here

    Question

    ( 12.43×12.43×12.43 +19.57×19.57×19.57) /

    (12.43×12.43-12.43×19.57 +19.57×19.57)
    A 32 Correct Answer Incorrect Answer
    B 36 Correct Answer Incorrect Answer
    C 34 Correct Answer Incorrect Answer
    D 30 Correct Answer Incorrect Answer

    Solution

    Let a = 12.43 and b = 19.57. So, (a3+b3) / (a2-ab+b2) As we know that - a3+b3 = (a+b) (a2-ab+b2). =(a+b) (a2-ab+b2) / (a2-ab+b2). The term (a2-ab+b2) cancel out and leave- =(a+b) =12.43+19.57 =32.

    Practice Next

    Relevant for Exams: