Question : What is the value of $\sqrt{1.6 \times 1.6+0.9 \times 0.9+3.2 \times 0.9}$?
Option 1: 6.5
Option 2: 2.5
Option 3: 6.25
Option 4: 5.5
Correct Answer: 2.5
Solution :
Let's simplify the expression
$\sqrt{1.6 \times 1.6+0.9 \times 0.9+3.2 \times 0.9}$
= $\sqrt{2.56+0.81+2.88}$
= $\sqrt{6.25}$
= $2.5$
Hence, the correct answer is 2.5.
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