SOLUTION: A christmas tree is decorated with lights coloured green, red ane yellow which light up after 9 seconds, 12seconds and 6 seconds respectively.how many times will the three lights,

Question 965736: A christmas tree is decorated with lights coloured green, red ane yellow which light up after 9 seconds, 12seconds and 6 seconds respectively.how many times will the three lights, light up together in 1 hour?
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
A christmas tree is decorated with lights coloured green, red ane yellow which light up after 9 seconds, 12seconds and 6 seconds respectively.
how many times will the three lights, light up together in 1 hour?
:
find the least common multiple of 9,12,6, every 36 seconds, they all light together
Change 1 hr to 3600 seconds
= 100 times all lit together in one hr

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