Question

A bus covers first 120 km in 2 hours, next 150 km in 3 hours and the last 60 km in 1 hour. Find the average speed of the bus.

• A. 60 km/hr
• B. 55 km/hr
• C. 50 km/hr
• D. 45 km/hr

Answer 1

The correct option is B 55 km/hr

$Averagespeed$ = $\frac{\text{Total distance}}{\text{Total time taken}}$

Now, total distance travelled
= 120 + 150 + 60 km = 330 km

and total time taken = 2 + 3 + 1 hours

= 6 hours

$\therefore$ Average speed of train = $\frac{330}{6}$

= 55 km/hr