Question

Rahul drove his car to a shopping mall 20 km from home in 20 min and came back in 30 min what his average speed in km/h

Answer 1

Answer:

brainliest...

Step-by-step explanation:

•Let the distance covered by Rahul to his college be 'd'.

He went with a speed of 20km/hr.

So the time taken by him would be d/20 hr (t=d/sp.)

•Now he came back the same distance so again the distance covered by him would be 'd'.

He came back with a speed of 30km/hr. So the time taken by him to come back would be d/30.

•Average speed of his entire journey is 24km/hr (av. sp.= total d/ total time).

Read more on Brainly.in - https://brainly.in/question/4123074#readmore

Answer 2

.average speed=total distance traveled/time taken

.distance from home to shopping mall is 20km

.so the distance back to home from mall will be 20km.

. therefore total distance from home to mall and back to home from mall=20km+20km=40km.

.Total time taken is 20min +30min=50min

50min=0.016hr

.so using the above given formula.

average speed=40km/0.0167hr=2395.2approx