Q12. Zara strikes her drum every 9 seconds and Aisha plucks her guitar every 15 seconds. They strike and pluck at the same time at the beginning of the song. After how many seconds next will they strike and pluck together? *
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Answer:
After 45 seconds
Explanation:
Drum - Every 9 seconds
Guitar - Every 15 seconds
To find that after how many seconds next they will strike and pluck together, we will take its LCM.
LCM of 15 and 9 = 45
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