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### Question

What is the value of $x$ in $√{0.0064 × x}$ = 0.8?

**A**

100.

**B**

8.

**C**

80.

**D**

0.8.

**Soln.**

**Ans: a**

The given expression can be simplified to $0.0064 × x$ = $0.8^2$, which gives x = ${0.8^2}/0.0064$, which is same as $0.64/0.0064$ which gives 100.