Question

A car travels a distance of 150 km in 2 hours at a uniform speed. Find its speed in km/h and m/s.


Thank you!!

Answer 1

Given,

Distance is 150 km.

The time is 2 hours.

To Find,

The speed in $km/hr$ and $m/s$.

Solution,

We first need to know the formula for finding the speed. So speed is simply the division of distance and time. Now, these units of distance can be in km or in m. The units of time can also be seconds or minutes or hours. We are given a distance of 150 km and time as 2 hours.

so,

$speed = distance / time\\speed = 150/ 2\\speed = 75 km/hr$

Now to find the answer in m/s  we will do the conversions.

$1 km = 1000m\\150 km \\= 150000 m$

Also,

$1 hour = 3600 seconds\\2 hours\\= 2*3600\\= 7200 seconds$

speed = distance / time\\speed = 150000/ 7200\\speed = 20.833 m/s$speed = distance / time\\speed = 150000/ 7200\\speed = 20.833 m/s$

Hence if a car travels a distance of 150 km in 2 hours at a uniform speed then its speed is 75 $km/hr$ and 20.33$m/s$

Answer 2

Given,

Total distance traveled by car = 150 Km

Time taken = 2 hours

To find,

The speed of the car in km/h and m/s.

Solution,

We can simply solve this numerical problem by using the following process:

Mathematically,

speed (s) = distance traveled (d)/time of journey(t)

Now, according to the question;

The speed of the car

= distance traveled (d)/time of journey(t)

= 150 Km/2 hours

= 75 Km/hr (Answer in Km/hr)

= (75×1000/3600) m/s

{Since, 1 Km/hr = 1000 m/3600 s}

= 20.83 m/s (Answer in m/s)

Hence, the speed of the car is equal to 75 Km/hr and 20.83 m/s, respectively.