Question

8. The diameter of the flower bed is 56 cm, if this has to be surrounded by a path 7 cm wide, what is the area
11m respectively. Find the difference in their area covered while grazing the grass.
of this path?
Cad the area of a circular ring whose inner and outer radii are 22.mand 12
the leng
1 tin​

Answer 1

Answer:

Step-by-step explanation:

Flower bed - Path = 56 - 7 = 49cm. = 343 cm ^2. Answer :- Area of path is 105 cm^2.

Answer 2

Answer:

Diameter of the circular flower bed=66m

∴ Radius of circular flower bed(r)=

2

66

=33m

∴ Radius of circular flower bed with 4 m wide path(R)=33+4=37m

According to the question,

Area of path=Area of bigger circle−Area of smaller circle

=πR

2

−πr

2

=π(R

2

−r

2

)

=π[(37)

2

−(33)

2

]

=3.14[(37+33)(37−33)] [∵a

2

−b

2

=(a+b)(a−b)]

=3.14×70×4

=879.20m

2

.

Therefore, the area of the path is 879.20m

2

.