Question

As shown in the figure, four napkins all of the same size were made from a square piece of cloth of length 1 m. What length of lace will be required to trim all four sides of all the napkins?

Answer 1

Side of the square piece of cloth = 1 m 

∴ Side of each napkin = 0.5 m 

Length of lace that will be required for 1 napkin = perimeter of the napkin 

= 4 x side = 4 x 0.5 = 2 m 

∴ Perimeter of 4 napkins = 4 x 2 = 8 m 

∴ 8 metre long lace will be required to trim all four napkins.