Advertisements
Advertisements
प्रश्न
Area of circular garden with diameter 8 m is ______.
विकल्प
12.56 m2
25.12 m2
50.24 m2
200.96 m2
Advertisements
उत्तर
Area of circular garden with diameter 8 m is `bb(underline(50.24 cm^2))`.
Explanation:
Given, diameter = 8 m
So, radius = `8/2` m = 4 m ...`[∵ "Radius" = "Diameter"/2]`
∴ Area of circular garden = πr2 = `22/7 xx 4 xx 4` = 50.24 m2
APPEARS IN
संबंधित प्रश्न
A doorway is decorated as shown in the figure. There are four semi-circles. BC, the diameter of the larger semi-circle is of length 84 cm. Centres of the three equal semicircles lie on BC. ABC is an isosceles triangle with AB = AC. If BO = OC, find the area of the shaded region. (Take `pi = 22/7`)

A wire bent in the form of an equilateral triangle has an area of 121 `sqrt 3` cm2. If the same wire is bent into the form of a circle , find the area enclosed by the wire.
A lawn is in the shape of a semi-circle of diameter 42 m. The lawn is surrounded by a flower bed of width 7 m all around. Find the area of the flower bed in m2 .
The cost of fencing a circular field at the rate of ₹ 240 per meter is ₹ 52,800. The field is to be ploughed at the rate of ₹ 12.50 per m2. Find the cost of pouching the field.
Each wheel of a car is of diameter 80 cm. How many completer revolutions does each wheel make in 10 minutes when the car is traveling at a speed of 66 km per hour?
Construct an angle PQR = 45°. Mark a point S on QR such that QS = 4.5 cm. Construct a circle to touch PQ at Q and also to pass through S.
The center O of a circle of a radius 1.3 cm is at a distance of 3.8 cm from a given straight line AB. Draw a circle to touch the given straight line AB at a point P so that OP = 4.7 cm and to touch the given circle externally.
A wire bent in the form of an equilateral triangle has an area of `121sqrt(3)"cm"^2`. If the same wire is bent into the form of a circle, find the area enclosed by the wire.
Formula used to find the circumference of a circle is
A circle with radius 16 cm is cut into four equal parts and rearranged to form another shape as shown in the following figure:

Does the perimeter change? If it does change, by how much does it increase or decrease?
