reisham reisham

17-09-2015
Mathematics

contestada

George found that he blinked 85 times in 15 minutes. At this rate, how many seconds passed during 51 blinks?

Respuesta :

cclemeno cclemeno

17-09-2015

first convert the 15 minutes to seconds
60 sec-= 1 minute
900 sec = 15 minutes

ratio and proportion

85 blinks/900 sec= 51 blinks/ x seconds

cross multiply
85x=45900
divide by 85
x= 540 seconds
hope this helps

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