If $$\sqrt{20} + \sqrt{125} = 15.65$$, then what is the value of $$\sqrt{45} + \sqrt{5}$$?
Given : $$\sqrt{20}+\sqrt{125}=15.65$$
=> $$2\sqrt5+5\sqrt5=15.65$$
=> $$\sqrt5=\frac{15.65}{7}$$ ----------(i)
To find : $$\sqrt{45}+\sqrt5$$
= $$3\sqrt5+\sqrt5=4\sqrt5$$
= $$4\times\frac{15.65}{7}\approx8.94$$
=> Ans - (B)
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