A) 7.09
B) 7.10
C) 7.11
D) 7.12
Correct Answer: C
Solution :
\[\sqrt{4096}=64\] Now, \[\sqrt{40.96}=\sqrt{0.4096}+\sqrt{0.004096}\] \[=\sqrt{0.00004096}\] \[=\sqrt{\frac{4096}{100}}+\sqrt{\frac{4096}{10000}}+\sqrt{\frac{4096}{1000000}}+\sqrt{\frac{4096}{100000000}}\] \[=\frac{64}{10}+\frac{64}{100}+\frac{64}{1000}+\frac{64}{10000}\] \[=6.4+0.64+0.064+0.0064\] \[=7.1104=7.11\](approx.)You need to login to perform this action.
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