At two crossroads signals,lights change after every 25 seconds and 45 second respectively. if they changed together at 9.20am , then when will they changed together next? explain step by step
answer should be 9:23:45 am
answer should be 9:23:45 am
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225/60
=3 45/60
I.e. 3 mins and 45 seconds after initila count
I.e.9.23.45 am