A rectangular acrylic sheet is `36 cm` by `25 cm` .From it, 56 circular buttons,each of diameter `3.5 cm` have been cut out.Find the area of the remaining sheet.

A rectangular acrylic sheet is 24 cm by 20 cm. From it, 49 circular buttons, each of diameter 3.5 cm have been cut out. Find the area of the remaining sheet.

A rectangular sheet of acrylic is 34 cm by 24 cm. From it, 64 circular buttons, each ofdiameter 3.5 cm, have been cut out. Find the area of the remaining sheet.

From a rectangular cardboard sheet 145 cm long and 32 cm broad ,42 circular plates each of diameter 8 cm have been cut out . Find the area of the remaining portion of the sheet.

From a circular sheet of radius 4 cm, a circle of radius 3 cm is removed. Find the area of the remaining sheet. (Takepi = 3.14)

From a circular sheet of radius 4cm, a circle of radius 3cm is removed. Find the area of the remaining sheet. (Take pi=3.14 )

From a rectangular metal sheet of sides 25 cm and 20 cm, a circular sheet as large as possible is cut-off. What is the area of the remaining sheet?

From a rectangular sheet of tin, of size 100 cm by 80 cm, are cut four squares of side 10 cm from each corner. Find the area of the remaining sheet.