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Question 3. Two neon lights are turned on at the same time. One blinks every 4 seconds and the other blinks every 6 seconds. Answer the following questions, give your answer only.
a) How long will it take them to blink simultaneously for the first time after they are turned on? (simultaneously: at the same time)
a = 6 s
Question 3. Two neon lights are turned on at the same time. One blinks every 4 seconds and the other blinks every 6 seconds. Answer the following questions, give your answer only.
b) How many times will they blink simultaneously in the first 70 seconds after they are turned on?
b) 11
bài làm
The number of seconds lost in his watch's content is 60 times 4 times 60= 14400 Seconds
`5` minutes `= 5 xx 60= 300` seconds
`5` minutes `27` seconds : 3= `300 + 27 : 3=309` seconds
5min = 5 x 60seconds = 300sec
We have:
300 : 3 = 100(sec)