Advertisements
Advertisements
प्रश्न
Saima wants to put a lace on the edge of a circular table cover of diameter 1.5 m. Find the length of the lace required and also find its cost if one meter of the lace costs ₹ 15. (Take π = 3.14)
Advertisements
उत्तर
Circumference = 2πr
= `2pir xx 3.14 xx d/2`
= `2 xx3.14xx (1.5)/2`
= 4.71 m
Cost of 1 m lace = ₹ 15
Cost of 4.71 m lace = 4.71 × 15
= ₹ 70.65
APPEARS IN
संबंधित प्रश्न
A car has wheels which are 80 cm in diameter. How many complete revolutions does each wheel make in 10 minutes when the car is travelling at a speed of 66 km per hour ?
In the given figure, ∆ ABC is a right-angled triangle in which ∠ A is 90°. Semicircles are drawn on AB, AC and BC as diameters. Find the area of the shaded region
In making 1000 revolutions, a wheel covers 88 km. The diameter of the wheel is ______.
The area between the circumferences of two concentric circles is 2464 cm2. If the inner circle has circumference of 132 cm, calculate the radius of outer circle.
Find the area grazed by a horse tied with a 11. 2 m rope to a corner of a field measuring 25m by 15 m.
The circumference of a circular field is 308 m. Find is:
(i) Radius
(ii) Area.
Find the area and perimeter of the circles with following: Radius = 10.5cm
The perimeter of a sector of radius 5.2 cm is 16.4 cm, the area of the sector is ____________.
A wire is bent to form a square of side 22 cm. If the wire is rebent to form a circle, its radius is ______.
Circumference ‘C’ of a circle is equal to 2π × ______.
