Question

From a circular sheet of radius 3.5 cm, a circle of radius 1.4 cm is cut out . Find the area of the remaining sheet ​

Answer 1

Answer:

Radius of circular sheet(R)=14cm and Radius of smaller circle(r)=3.5cm

Length of rectangle(l)=3cm and breadth of rectangle(b)=1cm

According to question,

Area of remaining sheet=Area of circular sheet−[Area of two smaller circle+Area of rectangle]

=πR

2

−[2(πr

2

)+(l×b)]

=

7

22

×14×14−[(2×

7

22

×3.5×3.5)−(3×1)]

=22×14×2−[44×0.5×3.5+3]

=616−80

=536cm

2

Therefore the area of remaining sheet is 536cm

2

.

Answer 2

Step-by-step explanation:

r=14 cm

total area= ur

=22/7*196=616 cm2

r2= 3.5 cm

area of the small circles: 2*11r2=2*12.25*22/7=77 cm2 length of rectangle=3

breadth=1

area =lb=3 cm?

area of the small circles+area of rectangle=77+3-80 cm?

remaining area=616-80=536 cm2