Advertisements
Advertisements
Question
If the circumference of a circle is 176 cm, find its radius.
Advertisements
Solution
Circumference = 176 cm
Circumference = 2πr ... (where 'r' is the radius of circle)
176 = `2xx22/7xx"r"`
176 × 7 = 2 × 22 × r
1232 = 44r
`1232/44` = r
r = 28
∴ The radius of the circle = 28 cm
RELATED QUESTIONS
In Figure , two concentric circles with centre O, have radii 21cm and 42 cm. If ∠ AOB = 60°, find the area of the shaded region. [use π=22/7]
The parallel sides of trapezium are 12 cm and 9cm and the distance between them is 8 cm. Find the area of the trapezium.
PQRS is a diameter of a circle of radius 6 cm. The lengths PQ, QR and RS are equal. Semicircles are drawn with PQ and QS as diameters, as shown in the given figure. If PS = 12 cm, find the perimeter and area of the shaded region.
In a circle of radius 21 cm, an arc subtends an angle of 60° at the centre. The length of the arc is
A 4.2 m wide road surrounds a circular plot whose circumference is 176 m. Find the cost of paving the road at Rs 75 m 2.
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.
Complete the table below.
| Radius (r) | Diameter (d) | Circumference (c) |
| ...... | ...... | 616 cm |
The diameter of a wheel is 1.26 m. The distance traveled in 500 revolutions is ____________.
In covering a distance s metres, a circular wheel of radius r metres makes `s/(2πr)` revolutions. Is this statement true? Why?
The distance around a circle is its ______.
