Solve the following problems.
1)A circular flower has diameter of 7m.work out the area of the flower bed.
2)A cell phone mast has a range of 5km in all directions.Work out the area covered by one mast.
3) A circular mirror has an area of 144n square cm.What is the diameter of the mirror?
4)A circular pond has a radius of 2m.Work out the area of the pond.
5)Captain digs a 12m wide circular hole in his garden.What is the area of his hole?
6)The diameter of a circular fountain in a city park is 28 feet.A sidewalk that is 3.5 feet will be built around the fountain.Find the area of the sidewalk.
7)The diagram show an athletic field with a track around it.The track is 4 feet wide.The field is a rectangle with semicircles at the two ends.Find the area of the track.
Please answer this completely.i need the answer right now
Answers
Given : A circular flower has diameter of 7m.
A cell phone mast has a range of 5km in all directions
To Find : the area of the flower bed.
area covered by one mast.
Solution:
Area of circle = π ( radius)²
A circular flower has diameter of 7m.
=> area of the flower bed. = π (7)²
using π = 22/7
=> area of the flower bed. = (22/7) (7)² = 154 m²
A cell phone mast has a range of 5km in all directions
area covered by one mast. = π (5)²
using π = 3.14
=> area covered by one mast. =3.14 (5)² = 78.5 km²
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