Question

Find the average speed of car if it travels 18km in 20 minutes.​

Answer 1

0.9km/minute

or

54km/hour

Explanation:

• Average speed in km/minutes

18km in 20 minutes = 18km/20min

18km/20min = 0.9km/min

• Average speed in km/hour

1 hour = 60 minutes

20 minutes = 20/60 = 0.3333 hours

18km/20mins = 18km/0.3333hours = 54km/hour

Answer 2

`\boxed{\sf Average \ Speed = 54\ km/hr}`

Explanation:

Given:

Distance = S = 18 km

Time = t = 20 min = 20/60 = 0.33 hours

Required:

Average Speed = <v> = ?

Formula:

Average Speed = Total Distance Covered / Total Time Taken

Solution:

A . S = 18 / 0.33

A.S = 54 km/hr