Question

a.Calculate the average speed (in km/h) of Charlie, who runs to the store 4 kilometers away in 30 minutes. b.Calculate the distance (in km) that Charlie runs if he maintains this average speed for 1 hour

Answer 1

Charlie's average speed is 8 km/h, and if he runs at this speed for one hour, he will cover a distance of 8 kilometers.

Step-by-step explanation:

To calculate the average speed of Charlie, who runs to the store 4 kilometers away in 30 minutes, we use the formula for average speed:

Average speed = Total distance / Total time

First, we need to convert the time from minutes to hours to match the units for speed (km/h). Since there are 60 minutes in an hour, 30 minutes is 0.5 hours.

So, Charlie's average speed = 4 km / 0.5 h = 8 km/h.

To calculate the distance Charlie runs if he maintains this average speed for 1 hour:

Distance = Speed x Time

Charlie's speed is 8 km/h, and the time is 1 hour.

Distance = 8 km/h x 1 h = 8 km

Therefore, if Charlie runs for one hour at his average speed, he will cover a distance of 8 kilometers.

Answer 2

as per the question charlie runs to the store which is 4 km away

hence the total distance covered [S] is 4 km

he takes 30 minutes to reach the store.

hence the total time taken [t] = 30 minutes=0.5 hour

We have to calculate the average speed.

the average speed[v]=
`=(S)/(t)`

=
`(4 km)/(0.5 hour)`

=8 km/hour

then we have to calculate the total distance traveled by charlie in 1 hour.

the distance covered S=
`V_(avg) *t`

=8 km/hour ×1 hour

=8 km

Hence the average speed of charlie is 8 km/hour and he covers a distance of 8 km in 1 hour.