Subject

    Quantitative Aptitude

    Topic

    Percentage

    20% of 30% of twice a number is 36. Find the number

    ক)
    60
    খ)
    15
    গ)
    100
    ঘ)
    300
    ঙ)
    None of these

    Explanation

    Let the required number be ‘u’, then, According to the question ⇒ 20% of (30% of 2u) = 36 ∴20100×(30100×2u)=36\therefore \frac{{20}}{{100}} \times \left( {\frac{{30}}{{100}} \times 2u} \right) = 36 \eqalign{ & \Rightarrow u = \frac{{36 \times 100 \times 100}}{{2 \times 20 \times 30}}\; \cr & \Rightarrow {\text{ }}u{\text{ }} = {\text{ }}300. \cr}

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