Advertisements
Advertisements
Question
Find the area and perimeter of the circles with following: Diameter = 35cm
Solution
The radius of a Circle with diameter d is r = `"d"/(2)`
The Area of a Circle with radius r = πr2
The radius of a Circle with diameter 35 is r
= `(35)/(2)`
= 17.5cm
The Area of a Circle with radius r
= π(17.5)2
= `(22)/(7) xx (17.5)^2`
= 962.5cm2
The Circumference of a Circle with diameter d is πd
The Circumference of a Circle with diameter 35 is π x 35
= `(22)/(7) xx 35`
= 110cm.
APPEARS IN
RELATED QUESTIONS
In Figure, find the area of the shaded region [Use π = 3.14]
A wire is looped in the form of a circle of radius 28 cm. It is re-bent into a square form. Determine the length of the side of the square.
Find the angle subtended at the centre of circle of radius 5cm by an arc of length `((5pi)/3)` cm
The minute hand of clock is10cm long. Find the area of the face of the clock described by the minute hand between 8am and 8:25 am
OACB is a quadrant of a circle with centre O and its radius is 3.5 cm. If OD = 2 cm. find the area of
- quadrant OACB
- the shaded region.
Two circles touch each other externally. The sum of their areas is 5811 cm2 and the distance between their centres is 10 cm. Find the radii of the two circles.
Find the area and perimeter of the following sector :
Radius= 4.2 cm, angle at the centre is 60 °
Find the dimensions of a rectangular park whose perimeter is 60 m and area 200 m2.
The diameter of two circles are 28 cm and 24 cm. Find the circumference of the circle having its area equal to sum of the areas of the two circles.
Area of circular garden with diameter 8 m is ______.
