Multiple Choice Questions on The ratio of two numbers is 1 5 and their product is 320 What is the difference between the square o........... for CDS Exam Preparation

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Multiple Choice Questions

The ratio of two numbers is 1 5 and their product is 320 What is the difference between the square o...........

Quantitative Aptitude (CDS) Ratio, Proportion
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    The ratio of two numbers is 1 : 5 and their product is 320. What is the difference between the square of these two numbers?

    1024

    Incorrect Answer

    1256

    Incorrect Answer

    1536

    Correct Answer

    1640

    Incorrect Answer
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    Explanation:

    As ratio of numbers be 1: 5
    Let numbers be x, 5x
    Then,
    x × 5x = 320
     5x2 = 320
    x = 8
    Numbers be 8 and 8 × 5 = 40
    Now, difference between their square = (40)2 − (8)2
    = 1600 − 64
    = 1536

    By: Munesh Kumari
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