Due to pandemic Zoom Meeting platform is widely used all over the world. 40 minutes is enough for short discussion. But if is is 1 hour then it can be more appealing. Where other platform like Google Meet provides 1 hour free secession.
I agree with @Rupert . I believe the paid version has some great features. If you're only relegated to the free version, you may just have to keep the 40-minute meeting to only the most pertinent topics to keep it as succinct as possible within the timeframe.