2min 20sec to 1min 40sec
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Step-by-step explanation:
2min 20sec = (2*60 + 20) seconds
= (120 + 20) seconds
= 140 seconds
1min 40sec = ( 1*60 + 40 ) seconds
= (60 + 40) seconds
= 100 seconds
Ratio = 140 : 100
= 7 : 5
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