Question

Excluding stoppages, the speed of a bus is $54$ kmph and including stoppages, it is $45$ kmph. For how many minutes does the bus stop per hour?

• A. $10$
• B. $9$
• C. $8$
• D. $7$

Answer 1

Answer: (A)

$10$

Let speed of train x km\hr

Then ,speed of train =$\frac{150}{100}x=\frac{3}{2}x$ km \hr

$\therefore \frac{75}{x}-\frac{75}{\frac{3}{2}x}\frac{125}{10\times \times 60}\Rightarrow \frac{75}{x}-\frac{50}{x}=\frac{5}{24}\Rightarrow x=\frac{25\times 24}{5}120$ km \hr