Question

From a rectangular peice of sheet,with length and breadth 1.6m and 80cm,three circular sheets of radius 21 cm each are cut out find the area of remaining sheet

Answer 1

Answer:

Step-by-step explanation:

Area of rectangle sheet = length x breadth

Length = 1.6 m = 160 cm

Breadth = 80 cm

Area = 12,800 cm

Radius of circle = 21 cm

Area = πr^2 =22/7×21×21=4,158 cm

Remaining area = 12,800-4,158 = 8,642

Answer 2

Answer:

Length of the metal sheet = 1.60m = 160cm

Breadth of the metal sheet = 80cm

Total area of the metal sheet =l *b

=160*80

=12800cm²

radius of each circle = 21 cm

area of 3 circles=(22*21*21/7)*3

= 29106/7

=4158 cm²

Area of metal sheet left= total area of metal sheet - area of 3 circles

=(12800 - 4158)

= 8642 cm²