Question

What is the speed of a car that travels 150 km in 3.00 hrs? Is the car speeding on 84th st? (1.0 m/s = 2.23 mi/hr)

Answer 1

Speed = (distance) / (time for the distance)

= (150 km) / (2 hours) = (150 / 2) (km/hour) = 75 km/hour .

(about 46.6 miles/hour)

We don't know the posted speed limit on 84th Street,
so have no basis on which to issue a traffic citation
for a moving violation.

Answer 2

Speed of a car that travels 150 km in 3.00 hrs is 30.97mi/hr

Step-by-step explanation:

Given:

Distance = 150km

Time = 3hrs

To find:

Speed of the car:

Solution:

`Speed = (distance)/(time)`

So by substituting in the equation we get that,

`Speed =(150)/(3)`

Speed= 50km/hr

1km/hr = (5/18)m/s

So,

speed = 50*5/18

`speed =\text{50}*(5)/(18)`

speed=(
`(250)/(18)`)m/s

1m/s = 2.23mi/hr

So we get that,

Speed =
`\text{250}*(18)/(2.23)`

speed = 30.97mi/hr