Question

A mechanical watch becomes fast by $5$ minutes everyday. By what percent does it become fast?

• A. $\frac{31}{144}\%$
• B. $\frac{25}{3}\%$
• C. $\frac{5}{6}\%$
• D. $\frac{25}{72}\%$

Answer 1

The correct option is D $\frac{25}{72}\%$

Number of minutes in a day $=(24\times 60)=1440$
$\therefore$ Required percentage
$=(\frac{5}{1440}\times 100)\%=\frac{25}{72}\%$