Question

A car travels from a to b at 60km/h and returns to a at 90km/h.What is its average velocity and average speed?

Answer 1

HEY MATE. .
HERE'S UR ANSWER....

AVERAGE SPEED=>

Initial speed from a to b = 60km/h
Distance = 60kms.

Final speed form b to a = 90km/h
Distance = 90kms.


➡Average speed = Total distance / total time taken

➡Average speed = 60 +90 /1 + 1

➡Average speed = 60 + 90 / 2

➡Average speed = 150 / 2

➡Average speed = 75km/h.



AVERAGE VELOCITY

Initial velocity (u) = 60km/h

Final velocity (v) = 90km/h


➡Average velocity = v + u / 2

➡Average velocity = 90 + 60 / 2

➡Average velocity = 150 / 2

➡Average velocity = 75km/h.


HOPE IT HELPS U..✌✌✌

Answer 2

⛦Hᴇʀᴇ Is Yoᴜʀ Aɴsᴡᴇʀ⚑
▬▬▬▬▬▬▬▬▬▬▬▬☟

Let be the distance from A to B be x

Given,
▬▬▬

➧ Speed from A to B 60 km/ hr and from B to A 90 km/ hr .

➧ Total distance = x + x = 2x

➧ Time from A to B = 60 / x
& from B to A = 90 / x

➧ Total time = 60 / x + 90 / x

➧ Average velocity for non-uniform speed
=> total distance / total time

➾ 2x / 60 / x + 90 / x

➾ 2x / 60 + 90 / x

➾ 60 + 90 / 2

➾ 75 km/ hr...✔

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Thanks...✊