Question

Please help and thank you

Answer 1

First day: 30 mins

Second day: 40 mins

Third day: 50 mins

Fourth day: 60 mins

Fifth day : 70 mins

Sixth day : 80 mins

Seventh day : 90 mins

Eighth day : 100 mins

Ninth day : 110 mins

Tenth day : 120 mins

Your answer would be : B