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    Subject

    Bank Exam

    Topic

    Pubail Bank Ltd. - Trainee Assistant Teller - 2017

    0.0025 ×2.25 ×0.0001 =?\sqrt {0.0025}  \times \sqrt {2.25}  \times \sqrt {0.0001}  = ?

    ক)
    0.000075
    খ)
    0.00075
    গ)
    0.0075
    ঘ)
    0.075

    Explanation

    Solution: 0.0025 ×2.25 ×0.0001\sqrt {0.0025}  \times \sqrt {2.25}  \times \sqrt {0.0001} = (0.5  )2   ×(1.5  )2   ×(0.1  )2  \sqrt {{{(0.5\;)}^{2\;}}}  \times \sqrt {{{(1.5\;)}^{2\;}}}  \times \sqrt {{{(0.1\;)}^{2\;}}} = 0.05 × \times 1.5 × \times 0.01 = 0.00075 Alternative: 2510000×225100 ×110000 =5100×1510×1100=75100000\sqrt {\frac{{25}}{{10000}} \times \sqrt {\frac{{225}}{{100}}}  \times \sqrt {\frac{1}{{10000}}} }  = \frac{5}{{100}} \times \frac{{15}}{{10}} \times \frac{1}{{100}} = \frac{{75}}{{100000}} = 0.00075

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