Advertisements
Advertisements
प्रश्न
A gardener wants to fence a circular garden of diameter 21 m. Find the length of the rope he needs to purchase, if he makes 2 rounds of fence. Also find the costs of the rope, if it cost ₹ 4 per meter. (Take `pi = 22/7`)
Advertisements
उत्तर
d = 21 m
r = `21/2` m
Circumference = 2πr
= `2 xx 22/7 xx 21/2`
= 66 m
Length of rope required for fencing = 2 × 66 m
= 132 m
Cost of 1 m rope = ₹ 4
Cost of 132 m rope = 4 × 132
= ₹ 528
संबंधित प्रश्न
The wheels of a car are of diameter 80 cm each. How many complete revolutions does each wheel make in 10 minutes when the car is traveling at a speed of 66 km per hour? [Use Π = 22/7]
The outer circumference of a circular race track is 528m. The track is everywhere 14m
wide. Calculate the cost of leveling the track at rate of 50 paise per square metre.
Find the area and perimeter of the circle with the following:
Diameter= 35 cm
Find the area and perimeter of the following semi-circle :
Radius= 1.4 cm
Find the circumference of the circle whose area is 81π cm 2.
The circumference of a circle is 440 cm. Find its radius and diameter. (Take π = `22/7`)
The perimeter of a square and the circumference of a circle are equal. If the length of each side of the square is 22 cm, find:
(i) perimeter of the square.
(ii) circumference of the circle.
(iii) radius of the circle.
The diameter of a circle is 5.6 cm. Find its circumference.
Find the perimeter of the given shape (Take π = `22/7`).
A ground is in the form of a circle whose diameter is 350 m. An athlete makes 4 revolutions. Find the distance covered by the athlete
