Question

Chiru goes to office at a speed of 15 km/hr and
returns back at a speed of 12km/hr. find his
average speed of the whole journey​

Answer 1

Answer:hi ur answer is here

Step-by-step explanation:

Answer 2

His  average speed of the whole journey​ is 13.33 km/hr.

Step-by-step explanation:

Given : Chiru goes to office at a speed of 15 km/hr and  returns back at a speed of 12 km/hr.

To find : His  average speed of the whole journey​ ?

Solution :

If the speed from A to B is x km/hr and on return from B to A is y km/hr.

Then the average speed is $A=\frac{2xy}{x+y}$

Here, x=15 km/hr and y=12 km/hr

Substitute,

$A=\frac{2\times 15\times 12}{15+12}$

$A=\frac{360}{27}$

$A=13.33$

Therefore, his  average speed of the whole journey​ is 13.33 km/hr.

#Learn more

A man covers 54kms at a speed of 9km/hr and the remaining 72 kms at 12km/hr what is his average speed for the whole journey

https://brainly.in/question/5552849