Advertisements
Advertisements
प्रश्न
The area of a circle is 98.56 cm2. Find its circumference.
उत्तर
Let the radius of the circle be r.
Now.
Area = 98.56
⇒ πr2 = 98.56
`⇒ 22/7xx"r"^2 = 98.56`
⇒ r = 5.6
Now,
Circumference `=2pi"r"=2xx22/7xx5.6=35.2 "cm"`
Hence, the circumference of the circle is 35.2 cm.
APPEARS IN
संबंधित प्रश्न
Find the area and perimeter of an isosceles right angled triangle, each of whose equal sides measure 10cm.
In the given figure, ABCD is a trapezium with AB || DC, AB = 18 cm DC = 32 cm and the distance between AB and DC is 14 cm. Circles of equal radii 7 cm with centres A, B, C and D have been drawn. Then find the area of the shaded region.
(Use \[\pi = \frac{22}{7}\]
The area of a circle is 220 cm2. The area of ta square inscribed in it is
Find the area of the shaded region in the given figure, if ABCD is a rectangle with sides 8 cm and 6 cm and O is the centre of the circle.
The diameter of the wheels of a bus is 140 cm. How many revolutions per minute do the wheels make when the bus is moving at a speed of 72.6 km per hour?
Two circles touch each other externally. The sum of their areas is 74π cm2 and the distance between their centers is 12 cm. Find the diameters of the circle.
Find the area of the dining table whose diameter is 105 cm
A sprinkler placed at the centre of a flower garden sprays water covering a circular area. If the area watered is 1386 cm2, find its radius and diameter
The area of the circle whose diameter is 21 cm is ____________.
If the radii of two circles are in the ratio of 4 : 3, then their areas are in the ratio of ______.
