Calculate 83039

The whole movie lasts 1 hour. The time left until the end of the film is half of the time that has already passed since the film's beginning. Calculate how many minutes are left until the end of the movie.

Correct answer:

b =  20 min

Step-by-step explanation:

t=1 h min=1 60  min=60 min  a+b=t b = a/2  a+a/2=t a+a/2=60  3a=120  a=3120=40  a=40  b=a/2=40/2=20 min



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