Find The Value of 0.07*0.07*0.07-0.05*0.05*0.05 0.07*0.07+0.07*0.05+0.05*0.05

 

0.07*0.07*0.07-0.05*0.05*0.05
0.07*0.07+0.07*0.05+0.05*0.05

  1. 0 . 002
  2.  0.02
  3.  0.2
  4.  0.0002

 

 

 
Harsh Vardhan Professor Asked on 24th July 2015 in Maths.
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  • 1 Answer(s)

    Answer: (2) 0.02
    Explanation:-
    (0.07*0.07*0.07-0.05*0.05*0.05)/(0.07*0.07+0.07*0.05+0.05*0.05)
    = [(0.07)3 – (0.05)3]/[(0.07)2 + (0.05)2 + 0.07 x 0.07]
    Formula-
      a3 – b3 = (a – b) (a2 + b2 + ab)
    = (0.07 – 0.05) (0.072 + 0.052 + 0.07 x 0.05)/ (0.072 + 0.052 + 0.07 x 0.05)
    = (0.02) x 1
    = 0.02
    Hence, the answer is (2) 0.02.

    Anurag Mishra Professor Answered on 24th July 2015.
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