Conversion of Units of Speed
Here we will learn the conversion of units of speed
(i) Conversion of km/hr into m/sec
(ii) Conversion of m/sec to km/hr
How to convert km/hr into m/sec?
km/hr = 1 km/1 hr = 1 × 1000 m/60 × 60 sec = 1000/3600 m/sec = 5/18 m/sec
So, we say that to convert km/hr into m/sec, we multiply by 5/18.
Solved examples on conversion of km/hr into m/sec:
1. Convert 72 km/hr to m/sec
Solution:
72 km/hr
= 72 × 5/18 m/sec
= 20 m/sec
2. The speed of the bicycle is 90 km/hr, what is its speed in m/sec?
Solution:
Speed of bicycle = 90 km/hr
To convert the speed into m/sec, we multiply by 5/18
Therefore, speed of bicycle = 90 × 5/18 m/sec = 25 m/sec
3. A car covers a distance of 100 km in first two hours, 120 km in next 1 hour and 32 km in next 1/2 hour. Convert the speed into m/sec.
Solution:
Total distance covered by the car = (100 + 120 + 32) km = 252km
Total time taken = (2 + 1 + 1/2) hr = (4 + 2 + 1)/2 = 7/2 hr
Therefore, average speed = Distance covered/Time taken
= 252 km/(7/2) hr
= 252/1 × 2/7 km/hr
= 72 km/hr
To convert the speed into m/sec, we multiply by 5/18
Therefore, 72 km/hr = 72 × 5/18 = 20 m/sec
How to convert m/sec to km/hr?
m/sec = 1m/1sec = (1/1000) km/(1/60 × 60) hr = 60 × 60 /1000 km/hr = 18/5 km/hr
So, we say that to convert m/sec into km/hr, we multiply by 18/5
Solved examples on conversion of km/hr into m/sec:
1. Convert 40 m/sec to km/hr
Solution:
40m/sec
= 40 × 18/5
= 144 km/hr
2. The speed of a cyclist is 4 m/sec. find the speed in km/hr.
Solution:
Speed of a cyclist = 4 m/sec
To convert the speed in km/hr, we multiply by 18/5
Therefore, speed of the cyclist = 4 × 18/5 km/hr
= 72/5 km/hr
= 14.4 km/hr
Hence, we have learnt the conversion of units of speed from km/hr to m/sec and m/sec to km/hr.
Relationship between Speed, Distance and Time
Problems on Calculating Distance
Two Objects Move in Same Direction
Two Objects Move in Opposite Direction
Train Passes a Moving Object in the Same Direction
Train Passes a Moving Object in the Opposite Direction
Two Trains Passes in the Same Direction
Two Trains Passes in the Opposite Direction
8th Grade Math Practice
From Conversion of Units of Speed to HOME PAGE
Didn't find what you were looking for? Or want to know more information about Math Only Math. Use this Google Search to find what you need.
|
|
New! Comments
Have your say about what you just read! Leave me a comment in the box below. Ask a Question or Answer a Question.