Question

1) Find the HCF of 18, 54, 81
2) The traffic lights at three different road crossing change after every 48 seconds, 72
seconds and 108 seconds respectively. If they change simultaneously at 7 am, at
what time will they change simultaneously again?

Answer 1

Answer:

the answer is

Step-by-step explanation:

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In the second question, the traffic lights will blink together after 432 seconds..

Answer 2

Answer:

1-9

2-432seconds,7mimute 12 second,7 hour 7minute and 12 second