Four bells toll with intervals of 30 70 120 and 140 seconds respectively. After how long will they again toll together?
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Answered by
5
Answer:
1440 Is the right answer
Answered by
2
Answer:
Step-by-step explanation:
L. C. M = 30 = 2×3×5
70= 2×5×7
120= 2*2*2*3*5
140= 2*2*5*7
Then- 2*3*5*7*2*2= 840 sec.
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