Two neon lights are turned on at the same time. One blinks every 4 seconds and the other blinks every 5 seconds. In 2 minutes, how many times will they blink at the same time?
Answers
Answered by
5
Answer:
six times
Step-by-step explanation:
LCM of 4&5=20
that means they will blink together in 20 sec,40 sec,60 sec,80 sec,100 sec and 120 sec
do in 2 min ( 120 sec) it will blink six times
Answered by
0
Answer:
7 times
Step-by-step explanation:
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