The second podcast was twice as long as the first so 2*45 = <<2*45=90>>90
1 hour is 60 mins. So his 1 hour and 45 min podcast is 60+45 = <<1*60+45=105>>105 minutes long
So far he has downloaded 45+90+105+60 = <<45+90+105+60=300>>300 min
If he converts 300 min to hours then he has 300/60 = <<300/60=5>>5 hours of podcasts downloaded
He has 5 hours of podcasts and his drive is 6 hours so he will need 6 - 5 = <<6-5=1>>1 more hour of podcasts
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