Hi guys, please help me with these two questions:

Find the speed in m/s of a point on a bicycle rim of diameter 88 cm, making 200 revolutions per minute.

and

Eight tins of paint are required for a surface of an area 50 m{square} if 4 coats of paint are applied. Find the number of tins of paint needed for an area of 70 m{square} if 5 coats of paint are applied.