Question

A car drives 494 km in 4 hours 45 minutes what is its average speed in kilometers per hour?

Answer 1

The average speed is 104 kilometer per hour

Solution:

Given that,

A car drives 494 km in 4 hours 45 minutes

To find: Average speed in kilometers per hour

The average speed is given by formula:

$Average\ speed = \frac{distance}{time}$

From given,

Distance = 494 km

Time = 4 hours 45 minutes

We know that,

1 hour = 60 minutes

Therefore,

$45\ minutes = \frac{45}{60}\ hour\\\\45\ minutes = 0.75\ hour$

Thus,

time = 4 hours 45 minutes = 4 hour + 0.75 hour = 4.75 hour

Thus average speed is:

$Average\ speed = \frac{494}{4.75}\\\\Average\ speed = 104$

Thus average speed is 104 kilometer per hour