There are two sets of traffic lights outside Eric's house. One day, he times how often they change. Set A turns green every 60 s
econds. Set B turns green every 70 seconds. At midday precisely they both turn green together.
At what time will they both turn green together again?
Pls I need help, I'm stuck
2 answers:
Answer:
12:07 or 7 minutes into midday
Step-by-step explanation:
You have to find the Least/lowest common multiple (LCM) of 60 and 70 which is 420.
So you divide 420 by 60 (60 second in a minute) which gives you the answer
7. So if you add 7 minutes into midday/add 7 minutes into 12:00,
it gives you the answer
<u><em>12:07 or 7 minutes into midday</em></u>
Answer:
12:07pm
Step-by-step explanation:
first common multiple of 60 and 70 is 420
420 s = 7 mins
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