Question

13, Fig. 15.12 shows two concentric circles with
diameter 100 cm and 80 cm. Find the area
of the shaded region. (Use t = 3.14)
gram
or a
Fin 15 12
Fig. 15.13​

Answer 1

Answer:

Area of shaded portion

=π(r

2

2

−r

1

2

)

=3.14((50)

2

−(40)

2

)

=3.14×900

=2826 cm

3