A) 5.6230
B) 6.6750
C) 3.3890
D) 2.2360
Correct Answer: D
Solution :
Given, \[\sqrt{5}=2.2360\] \[\therefore \]\[\sqrt{405}-\sqrt{320}=\sqrt{81\times 5}-\sqrt{64\times 5}\] \[=9\sqrt{5}-8\sqrt{5}=\sqrt{5}=2.2360\]You need to login to perform this action.
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