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Chelsea ran 26km in 3 hrs and 15min. To the nearest hundredth, what was her average speed in meter per second?

 Jul 5, 2020
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Since there are 1000 m in a km, there are 1000 x 26  =  26 000 m in 26 km

 

Since there are 60 sec in a min, there are 60 x 15  =  900 sec in 15 min

 

Since there are 60 x 60 = 3600 sec in an hour, there are 3600 x 3  =  10 800 sec in 3 hr.

 

There will be  900 sec + 10 800 sec  =  11 700 sec in 3 hr 15 min.

 

average speed  =  26 000 m  /  11 700 sec  =  2.22  meters per second

 Jul 5, 2020

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