Question

Q1 Rohan travels from his home to park with speed 54km/h and returns back by the same route with speed 72km/h. Find the average speed and average velocity through his whole journey.​

Answer 1

Answer:

Step-by-step explanation:

Let the distance between the school and the house is x km

Speed of the boy from house to school =54 km/hr.

Using formula, Time taken =

distance/speed

So, time taken = x/54

​hours.

Also,Speed of the boy from school to the house=72km/hr

So, time taken=x/30 hours

Total time taken =x/54 +x/72 =x/126 hours

Also total distance covered by boy =x +x=2x km.

Using formula,

Average speed =total distance/total time = 2x/x/12=24 km/hr.

Thus, average speed of the boy's journey is 24 km/hr.