A hollow garden roller 63 cm wide with a length of 440 cm is made of iron 4 cm thick. What is the volume of the iron used ?

A hemispherical is made of steel, 0.25cm thick. The inner radius of the bowl is 5 cm. find the outer curved surface area of the bowl and also find the total surface area and volume.

A man has a rectangular garden 55x40m and he makes a 1m wide diagonal path as shown in the diagram. What is the area of the path?