Question

A motorist covered a distance of 720km from 8.40am to 12.40pm. What was his speed in metres per second?​

Answer 1

50 meters per second

Explanation:

Conversion ratio from km to meters:

1 km = 1,000 meters

Let's find what 720km would be like in meters:

720km*1,000m = 720,000 meters

Now let's find the time in seconds, first let's find how many hours have passed.

12:40 - 8:40 --> 12.4 - 8.4 = 4 hours

1 hour = 60 minutes

Now let's convert the hours into minutes:

4 hours * 60 minutes

= 240 minutes

Convert the minutes into seconds:

1 minute = 60 seconds

240 minutes * 60 seconds

= 14,400 seconds

Now let's stack the speed over time:

720,000 meters 50

_________ = _____

14,400 seconds 1

50 meters per second.

Answer 2

Answer: Approximately 50 meters per second

Explanation:

Given:

Distance = 720 km

Time = 12.40 pm - 8.40 am = 4 hours

First, convert the distance from kilometers to meters:

Distance in meters = 720 km * 1000 m/km = 720,000 meters

Now, convert the time from hours to seconds:

Time in seconds = 4 hours * 3600 seconds/hour = 14,400 seconds

Finally, calculate the speed:

Speed = Distance / Time

Speed = 720,000 meters / 14,400 seconds ≈ 50 meters/second

So, the motorist's speed was approximately 50 meters per second.