What is the value of \sqrt7.84 +\sqrt 0.0784 + \sqrt0.000784 +\sqrt {0.00000784 }?

RRB NTPC Mains or Stage 2 Model Paper 5 with solutions

Question : 1 of 120

Marks: +1, -0

What is the value of

√7.84 +√ 0.0784 + √0.000784 +√ {0.00000784 }

Solution:

√7.84 + √0.0784 +√ 0.000784 + √0.00000784

=√ {784/100}+ √{784/10000}+√{784/1000000}+√{784/ 100000000}

=28/10+ 28/100+ 28 /1000+28/10000

= 2.8 + 0.28 + 0.028 + 0.0028 = 3.1108

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