Work out the area
This task is about using the diameters of tins to work out the floor area of a carton and a given number of tins.
a) 

Four paint tins each 12.5 cm in diameter, fit into a carton as shown. What is the area of the bottom of the carton? 
(A) (B) (C) (D) (E) 
50 cm² 100 cm² 625 cm² 1250 cm² None of these. The answer is __________ cm². 
b) 

The 6 smaller paint tins packed in this carton each have a radius of 5 cm. What is the total area of the bottom of all 6 paint cans? (Use = 3.14) 
(A) (B) (C) (D) (E) 
78.5 cm² 188.4 cm² 471 cm² 600 cm² None of these. The answer is _________ cm². 