On Tuesday, reaching a meeting place 15 minutes before 08:30 in the morning, I found that I had reached half an hour earlier than the person who came 40 minutes late. What was the scheduled time of the meeting?

On Tuesday, reaching a meeting place 15 minutes before 08:30 in the morning, I found that I had reached half an hour earlier than the person who came 40 minutes late. What was the scheduled time of the meeting?
 मंगलवार को मैं सुबह 08:30 बजे से 15 मिनट पहले बैठक स्थल पर पहुँचा। मैंने पाया कि मैं उस व्यक्ति से 30 मिनट पहले पहुँचा था, जो निर्धारित समय से 40 मिनट देर से आया था। बैठक का निर्धारित समय क्या था?