Question

    What approximate value will come in place of the question

    mark (?) in the following question? (Note: You are not expected to calculate the exact value.) √625 × 13.1 + 19.8² = ?
    A 725 Correct Answer Incorrect Answer
    B 690 Correct Answer Incorrect Answer
    C 775 Correct Answer Incorrect Answer
    D 795 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ,

    √625 = 25

    25 × 13.1 ≈ 25 × 13 = 325

    19.8² ≈ 20² = 400

    ⇒ 325 + 400 = 725

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