Question

MATHEMATICS
11. Acircle of radius 2 cm is cut out from a square piece of an aluminium sheet of site
6 cm. What is the area of the left over aluminium sheet? (Taken=3.14)
Thereumference of a circle is 31.4 cm. Find the radius and the area of the ci
19​

Answer 1

Answer:

area of circle = 22/7*2*2

= 88/7 CM square

area of square sheet = 6*6 CM square

= 36 CM square

area left in aluminium sheet = 36-88/7

= 252-88/7

= 164/7 cm2

Answer 2

Answer:

Left over part = Area of sheet - Area of circle

= ( 6×6 ) - 3.14 × 2 × 2

= ( 6×6 ) - 3.14 × 2 × 2

= 36 - 12.56

= 23.44 cm2

circumference of the circle = 2 × 3.14 × r

31.4 = 2 × 3.14 × r

31.4 / ( 2 × 3.14 ) = r

10 / 2 = r

5 = r

so radius = 5cm