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Online Quiz (Worksheet A B C D)

Questions Per Quiz = 2 4 6 8 10

Grade 8 - Mathematics
3.40 Ring - I

Example:
The radius of a circular path of garden is 60 metres. A circular path of width 3.5 metres is laid around and outside the garden. Find its area.

Solution:
We have given that,
r = 60 metres and width of the path = 3.5 metres.
So, the radius of the outer ring = 60 + 3.5
= 63.5 metres
Hence the area of the path = p (R+r)(R-r)
= 22/7 * (63.5 + 60)(3.5)
= 22/7 * 123.5 * 3.5
= 1358.5 Sq. mt.


Directions: Solve the following problems. Also write at least ten examples of your own.
Q 1: The radius of a circular path of garden is 70 metres. A circular path of width 17.5 metres is laid around and outside the garden. Find its area.
86625 Sq. mt.
866.25 Sq. mt.
8662.5 Sq. mt.
8662 Sq. mt.

Q 2: The radius of a circular path of garden is 30 metres. A circular path of width 2.8 metres is laid around and outside the garden. Find its area.
552.64 Sq. mt.
5526.4 Sq. mt.
55264 Sq. mt.
55266 Sq. mt.

Q 3: The radius of a circular path of garden is 54 metres. A circular path of width 10.5 metres is laid around and outside the garden. Find its area.
3920.5 Sq. mt.
3914.5 Sq. mt.
3910.5 Sq. mt.
39105 Sq. mt.

Q 4: The radius of a circular path of garden is 90 metres. A circular path of width 1.4 metres is laid around and outside the garden. Find its area.
7981 Sq. mt.
7981.6 Sq. mt.
79.816 Sq. mt.
798.16 Sq. mt.

Q 5: The radius of a circular path of garden is 65 metres. A circular path of width 0.7 metres is laid around and outside the garden. Find its area.
2875.4 Sq. mt.
287.4 Sq. mt.
28.754 Sq. mt.
287.54 Sq. mt.

Q 6: The radius of a circular path of garden is 80 metres. A circular path of width 4.9 metres is laid around and outside the garden. Find its area.
25394.6 Sq. mt.
253.946 Sq. mt.
2539.46 Sq. mt.
253946 Sq. mt.

Question 7: This question is available to subscribers only!

Question 8: This question is available to subscribers only!


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