Ships speed vs fuel consumption calculation

[Zahirul]

Hello,
what is consumption of a ship at 15 knotical miles per day that consumes 100 mt at 20 knotical miles per day?

 

[riser]

Which way is the wind blowing?

Not the place to do 4th grade homework.

 

[Reynod]

Is it a BP owned ship?

I ask because they seem to use more oil than the others ...