Ever forgotten the tin opener? Here’s how to open your beans using nothing more than a hard surface. ... Scrape the tin across the surface in a backwards-and-forwards motion.

Surface area is measured in square units, such as cm² and m². The volume close volume The amount of space occupied by a 3D shape, measured in cubic units, such as cm³, mm³ and m³.

Surface area of hemisphere \(= 2πr^2 + πr^2 = 3πr^2\) Example Calculate the volume and surface area of this hemisphere with a diameter of 18 cm. Give answers to the nearest integer.