Question

If ${\log }_{10}2+1$ is expressed in the form of ${\log }_{10}x$, then $x$ is equal to

• A. $20$
• B. $30$
• C. $15$
• D. $35$

Answer 1

The correct option is A $20$

Since, $x={\log }_{10}2+1$
$\therefore x={\log }_{10}2+{\log }_{10}10$ ($1={\log }_{10}10$)
$\therefore x={\log }_{10}20$ [$\log (a.b)=\log a+\log b$]