The combined solid made up of a cylinder and a cone . The radius of the base of the object is 3 cm , length of the cylindrical part is 20 cm and total length of the solid object is 24 cm. Find the curved surface area of the solid object ?

Sherrie is baking a pie for her family. she leaves the room and comes back to 35% of the pie having been eaten before she can put the topping on. how much 1 square inch strips of dough will she need for the top, now that a portion is missing? round your answer to the nearest while nimber.