What is the surface area of this cylinder 10mm and 15mm

10 ! a train starts from grand city and travels toward belleville 388 miles away. at the same time, a train starts from belleville and runs at the rate of 47 miles per hour toward grand city. they pass each other 4 hours later. find the rate of the train from grand city.

The volume of a sphere is increased by 6%. calculate the corresponding percentage increased in it area.

Ineed me i stuck and i don’t want to get it wrong