The value of (0.125 x 0.125 – 0.004 x 0.004)/(0.125 + 0.004) is

(a) 0.129
(b) 0.121
(c) 0.6
(d) 0.03125

Anurag Mishra Professor Asked on 30th June 2016 in Maths.
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  • 1 Answer(s)

    Answer: (b) 0.121 

    Solution:-
    (0.125 x 0.125 – 0.004 x 0.004)/(0.125 + 0.004)
     = {(0.125)^2 – (0.004)^2}/(0.125 + 0.004)

    Formula-
    a^2 – b^2 = (a + b) (a – b) 

    Then, (0.125 + 0.004) (0.125 – 0.004)/(0.125 + 0.004)
     = 0.125 – 0.004
     = 0.121. 

    Hence, the correct answer is option (b) 0.121. 

    Anurag Mishra Professor Answered on 3rd July 2016.
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