Question

13 Find the area of the shaded parts of the figure.
70 cm
4 cm
70 cm
3 cm
a​

Answer 1

Answer:

for a answer is- 30cm

Step-by-step explanation:

first we will find the area of inner circle of radius 3cm=

πr^2=

22/7x3x3=20.28

Now we will find for outer circle

of radius 4cm.

22/7x4x4=50.28

then the answer is inner circle minus outer circle

50.28-29.28=30..

Answer 2

A)

Answer:

area of small circle= pierR2

= 22/7 × 3 × 3

= 28.28 sq.cm

area of bigger circle = pieR2

= 22/7 × 4 × 4

= 50.28 sq.cm

area of shaded art = 50.28 - 28.28

= 22 sq.cm