Question

Calculate the speed of Charlie Who runs to the store 4 km away in 30 minutes

Answer 1

Answer:

Explanation:

Speed = distance/time

Dist.= 4km or 4000m

Time = 30mins

4000/30 =13.333

Answer 2

Answer:

The speed of Charlie who runs to the store 4 km away in 30 minutes

is 2.22m/s.

Explanation:

v=$\frac{dx}{dt}$

But When a body is moving with a uniform speed then we use a relation,

Speed is the distance moved per unit time to evaluate the speed of the body.

$Speed=\frac{Distance}{Time }$

Given,

Conversion of distance from kilometer to meter,

Distance=4km=4000m

Conversion of time from minutes to seconds,

Time=30minutes=30×60=1800seconds

$Speed=\frac{4000}{1800} m/s$

=2.22m/s

Hence, the speed of Charlie who runs to the store is  2.22m/s.