hamburger menu
All Coursesall course arrow
adda247
reward-icon
adda247
    arrow
    arrow
    arrow
    If (10.24 × 10.24) - (10.24 × A) + (0.24 × 0.24) is a perfect square, then find the value of 'A'.
    Question

    If (10.24 × 10.24) - (10.24 × A) + (0.24 × 0.24) is a perfect square, then find the value of 'A'.

    A.

    0.24

    B.

    0.36

    C.

    0.48

    D.

    0.12

    Correct option is C

    As we know,
    (a - b)2^2​ = a2^2​+ b2^2​ - 2ab
    =>(10.24 × 10.24)- (10.24 x A) + (0.24 × 0.24)
    => (10.24)2^2​ – (10.24 × A) + (0.24)2^2​​
    (10.24 – 0.24)2^2​ = 10.242^2​ + 0.242^2​ – 2 × 10.24 × 0.24
    On comparing,
    =>2 × 10.24 × 0.24=10.24 × A
    A = 0.48
    As we can see from Venn diagram only 1 condition is true .

    Free Tests

    Free
    Must Attempt

    CBT-1 Full Mock Test 1

    languageIcon English
    • pdpQsnIcon100 Questions
    • pdpsheetsIcon100 Marks
    • timerIcon90 Mins
    languageIcon English
    Free
    Must Attempt

    RRB NTPC Graduate Level PYP (Held on 5 Jun 2025 S1)

    languageIcon English
    • pdpQsnIcon100 Questions
    • pdpsheetsIcon100 Marks
    • timerIcon90 Mins
    languageIcon English
    Free
    Must Attempt

    CBT-1 General Awareness Section Test 1

    languageIcon English
    • pdpQsnIcon40 Questions
    • pdpsheetsIcon30 Marks
    • timerIcon25 Mins
    languageIcon English
    test-prime-package

    Access ‘RRB JE’ Mock Tests with

    • 60000+ Mocks and Previous Year Papers
    • Unlimited Re-Attempts
    • Personalised Report Card
    • 500% Refund on Final Selection
    • Largest Community
    students-icon
    353k+ students have already unlocked exclusive benefits with Test Prime!
    Our Plans
    Monthsup-arrow