Question

a car travels 144 km in 2 1/2 hours.the average speed of the car is _______ km/hr​

Answer 1

Answer:

Distance = 144 km

Time = 3.2 hrs

Speed = Distance/Time

Speed = 144/3.2 = 45 km/hr

Now, to convert speed from km/hr to m/s, we multiply the km/hr speed with 5/18 ( because 1 km = 1000 m and 1 hr = 3600 secs, therefore, 1 km/hr = 1000/3600 which is, you guessed it, 5/18 )

So, Speed = 45 * (5/18) = 12.5 m/s

Answer 2

Answer:

$speed = distance \div time$

Step-by-step explanation:

144 divided by 5/2

=360km/h