question_answer

The straight line distance between Ranchi and Patna is 260 km. An aero plane takes 30 minutes and a deluxe bus takes 8 hours to reach Patna from Ranchi. Calculate the average velocity of the plane and the bus.

Answer:

(i) Average velocity of the plane \[=\frac{Total\,\,displacement\,\,of\,\,the\,\,plane}{Total\,time\,\,taken}\] \[=\frac{260km}{30\min }=\frac{260\times 60}{30}km/hr\] \[=520km/hr\] Patna to Ranchi (ii) Average velocity of the bus \[=\frac{Total\,\,displacement\,\,of\,the\,bus}{Total\,\,time\,\,taken}\] \[=\frac{260km}{8hr}=32.5\,\,km/hr\]Patna to Ranchi.