Advertisements
Advertisements
प्रश्न
The diameter of a circle is 42 cm, find its perimeter. If the perimeter of the circle is doubled, what will be the radius of the new circle? (Take π = `22/7`)
उत्तर
Given, the Diameter of a circle = 42 cm
∴ Radius of circle = `42/2` = 21 cm
The perimeter of the circle = 2πr
=`2xx22/7xx21`
= 132 cm
If the perimeter of the circle doubled
= 2 × 132 =264 cm
Radius = `"C"/(2π)=264/(2xx22/7)`
= `(264xx7)/(2xx22)`
= 42 cm
APPEARS IN
संबंधित प्रश्न
Find the perimeter of a rectangle with length = 24 cm and diagonal = 25 cm
If P = perimeter of a rectangle, l= its length and b = its breadth find P, if l = 38 cm and b = 27 cm
If P = perimeter of a rectangle, l = its length and b = its breadth; find l, if P = 96 m and b = 28 m.
Find the perimeter of a square whose each side is 1.6 m.
The area of a rectangular shaped photo is 820 sq.cm. and its width is 20 cm. What is its length? Also find its perimeter
If we take 2 rounds of a field, that is 340 m long and 160 m wide. Find the distance covered in kilometers?
A square carrom board has a perimeter of 320 cm. How much is its area?
Can you make a rectangle with a still longer boundary? I made a rectangle 1 cm wide and 80000 m long. Imagine how long that boundary will be!!! With that much gold wire I can become a king!
Four regular hexagons are drawn so as to form the design as shown in the given figure. If the perimeter of the design is 28 cm, find the length of each side of the hexagon.
Find the perimeter of the following figure:
