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Chang and Rachel walk around a track. Chang walks each lap in 12 minutes. Rachel walks each lap in 10 minutes. The two of them begin at the starting line at the same time. They walk until they meet again at the starting line.Answer the following questions.

 

How many laps does Chang complete?

laps:

How many laps does Rachel complete?

laps:

How much time does it take for them to meet again at the starting line?

minutes:

 Apr 12, 2022
 #1
avatar+124592 
+1

Find the least common multiple of 10 and 12

 

10  =  5 * 2

12 = 2^2 * 3

 

LCM  =  2^2 * 3 * 5  =   60    minutes

 

So.....they  meet again in one  hour = 60 min

 

Chang walks  60 /  12 =    5 laps

 

Rachel  walks  60 / 10  = 6 laps

 

 

cool cool cool

 Apr 12, 2022
edited by CPhill  Apr 12, 2022
 #2
avatar+114 
-2

i been out for a while

 Apr 12, 2022

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