Advertisements
Advertisements
Question
The difference between the circumference and radius of a circle is 37cm. Using `pi = 22/7` , find the circumference of the circle.
Solution
Let the radius of the circle be r and circumference C.
Now,
C- r = 37
⇒ 2πr - r = 37
`⇒ "r" = (2xx22/7-1) = 37 `
`=> r = (37xx7)/37 = 7 "cm"`
Now, C = 2πr `=2xx22/7xx7=44 "cm"`
Hence, the circumference of the circle is 44 cm.
APPEARS IN
RELATED QUESTIONS
A field is in the form of circle. A fence is to be erected around the field. The cost of fencing would to Rs. 2640 at rate of Rs.12 per metre. Then the field is to be thoroughs ploughed at cost of Rs. 0.50 per m2. What is amount required to plough the field?
A playground has the shape of rectangle, with two semicircles on its smaller sides as diameters, added to its outside. If the sides of rectangle are 36m and 24.5m. find the area of playground.
What is the perimeter of a square which circumscribes a circle of radius a cm?
The circumferences of two circles are in the ratio 2: 3. What is the ratio between their areas?
The areas of two circles are in the ratio 4: 9. What is the ratio between their circumferences?
The area of a circle inscribed in an equilateral triangle is 154 cm2. Find the perimeter of the triangle.
Diameter of the circular garden is 42 m. There is a 3.5 m wide road around the garden. Find the area of the road.
The diameter of a cycle wheel is `4(5)/(11)"cm"`. How many revolutions will it make in moving 6.3km?
Diameters of different circles are given below. Find their circumference (Take π = `22/7`)
d = 56 m
Circumference of a circle of diameter 5 cm is ______.
