Question

a car is moveing A to B at average speed of 60km/h and return back with 40km/h find average speed of whole juruny



say me right method​

Answer 1

Explanation:

A household water audit is an assessment of how much water is used and how much water can be saved in the home. Conducting a water audit involves calculating water use and identifying simple ways for saving water in the home

Answer 2

Solution :

• Car is moving A to B with the speed of 60km/h

• Returns back from B to A with the speed of 40km/h

Let :

The distance from A To B be x

So, Total distance covered by car From A to B and also returns back from B to A = 2x

Let the time taken from A to B be T1 and from B to A be T2

• Speed = Distance/time
• distance = speed × time
• Time = Distance/speed

Time taken to covered by car from A to B :

= x/60

Time taken to covered by car from B to A :

= x/40

Total Time = x/60 + x/40

= (40x + 60x)/60 × 40

= 100x/60 × 40

= x/24

Average speed = Total distance/Total time

A.V = 2x/(x/24)

A.V = 2x × 24/x

A.V = 2 × 24

Average speed = 48km/h

━━━━━━━━━━━━━━━━━━━━━━━━━

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀Done࿐