Worksheet on Conversion of Units of Speed

Practice the questions given in the worksheet on conversion of units of speed. The questions are based on converting the speeds from km/hr to m/sec and converting the speeds from m/sec to km/hr.

We know, (i) to convert km/hr to m/sec, multiply by 5/18 and

(ii) to convert m/sec to km/hr, multiply by 18/5.

1. Convert each of the following speed into m/sec:

(i) 72 km/hr       

(ii) 12.6 km/hr       

(iii) 23.4 km/hr                  

(iv) 306 km/hr                   

(v) 38 km/hr

(vi) 54 km/hr     

(vii) 81 km/hr    

(viii) 14.4 km/hr


2. Convert each of the following speed into km/hr:

(i) 45 m/sec       

(ii) 4 m/sec         

(iii) 1.5 m/sec    

(iv) 2.8 m/sec    

(v) 22.5 m/sec

(vi) 120 m/sec   

(vii) 840 m/sec  

(viii) 6.25 m/sec


3. Express the following speed in m/sec.

(i) 36 km/hr                       

(ii) 90 km/hr                      

(iii) 144 km/hr            

(iv) 7.2 km/hr    

(v) 12.8 km/hr


4. Express the following speed in km/hr.

(i) 15 m/sec                       

(ii) 10.5 m/sec                   

(iii) 24 m/sec              

(iv) 30 m/sec     

(v) 4 ½ m/sec            


5. Which is greater – a speed of 24 km/hr or a speed of 12.8 m/sec?

6. Ron covers a distance of 1710 m in 3 minutes. Find his speed in km/hr.


Answers for the worksheet on conversion of units of speed are given below to check the exact answers after converting.


Answers:


1. (i) 20 m/sec

(ii) 3.5 m

(iii) 6.5 m

(iv) 85 m

(v) 10  5/9m

(vi) 15 m                                              

(vii) 22.5 m         


2. (i) 162 km       

(ii) 14.4 km         

(iii) 5.4 km

(iv) 10.08 km                     

(v) 81 km            

(vi) 432 km         

(vii) 3024 km      

(viii) 22.5 km


3. (i) 10 m/sec                   

(ii) 25 m/sec                      

(iii) 40 m/sec                     

(iv) 2 m/sec

(v) 3  5/9 m/sec                


4. (i) 54 km/hr                   

(ii) 37.8 km/hr                   

(iii) 86.4 km/hr

(iv) 108 km/hr                   

(v) 16.2 km/hr                  


5. 12.8 m/sec

6. 34.2 km/hr    

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