Question

$0.004\times x\times 0.04=\mathrm{0.000016.}$ Find $x.$

• A. $0.4$
• B. $0.01$
• C. $1$
• D. $0.1$

Answer 1

The correct option is D $0.1$

$x=\frac{0.000016}{0.004\times 0.04}$
(No. of decimal places in the denominator $=3+2=5$
$\therefore$ Shift the decimal point 5 places to the right in the numerator.)
$=\frac{1.6}{4\times 4}=\frac{1.6}{16}=\frac{16}{160}=\frac{1}{10}=0.1$