Advertisements
Advertisements
प्रश्न
A circular racing track has inner circumference 528 m and outer circumference 616 m. Find the width of the track.
उत्तर
Outer circumference = 616 m
Radius (R) = `"C"/(2π)=(616xx7)/(2xx22)"m"` = 98 m
Inner circumference = 528 m
∴ Inner radius (r) =`(528xx7)/(2xx22)"m"` = 84 m
∴ Width of track = R − r = 98 − 84 = 14 m
APPEARS IN
संबंधित प्रश्न
In Fig. 2, a circle is inscribed in a ΔABC, such that it touches the sides AB, BC and CA at points D, E and F respectively. If the lengths of sides AB, BC and CA and 12 cm, 8 cm and 10 cm respectively, find the lengths of AD, BE and CF.
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.
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?
Diagonal of a square is 20 cm. Find the length and perimeter of the square.
Find the area of the sector of a circle having radius 6 cm and of angle 30°. [Take π = 3.14]
A horse is placed for grazing inside a rectangular field 70 m by 52 m. It is tethered to one corner by a rope 21 m long. On how much area can it graze? How much area is left ungrazed?
In the given figure, OPQR is a rhombus, three of whose vertices lie on a circle with centre O. If the area of the rhombus is `32sqrt(3)`, find the radius of the circle.
The speed of the car is 66 km/hour. If each wheel of the car is 140 cm in diameter, find the number of revolutions made by each wheel per minute.
The inner circumference of a circular track is 264 m and the width of the track is 7 m. Find:
(i) the radius of the inner track.
(ii) the radius of the outer circumference.
(iii) the length of the outer circumference.
(iv) the cost of fencing the outer circumference at the rate of ₹50 per m.
The circumference of a circle is equal to the perimeter of a square. The area of the square is 484 sq.m. Find the area of the circle.
