Question

A man drive his car with
speed 20km/h while going
to his home he returned the
same route with speed 30km/h
calculate the average speed of
the car in the entire journey.​

Answer 1

$\huge{\boxed{\boxed{\underline{\bigstar{\mathbb{\pink{HELLO}}}}}}}$

20km/h...............(1)equation

30km/h...............(2)equation

(1) + (2)

20+30

50km/hr

Average= Sum of obseravation/No.of observation

50/2

=25km/h is the average speed of his whole journey...

Thanks...

Please Mark my answer as Brainliest...

Answer 2

Let the distance be d

speed (1) = 20 km/h

time taken = distance / speed

time taken = d / 20

speed (2) = 30 km/h

time taken = distance / speed

time taken = d / 30

average speed = total distance / total time

average speed = (d+d) / [(d/20) + (d/30)]

average speed = 2d / (d/12)

average speed = 24d / d

average speed = 24 km/h