Advertisements
Advertisements
प्रश्न
In the formula, C = 2πr, ‘r’ refers to
विकल्प
circumference
area
rotation
radius
उत्तर
In the formula, C = 2πr, ‘r’ refers to radius
APPEARS IN
संबंधित प्रश्न
Three semicircles each of diameter 3 cm, a circle of diameter 4.5 cm and a semicircle of radius 4.5 cm are drawn in the given figure. Find the area of the shaded region
Find the circumference of the circle with the following radius: (Take `bb(pi = 22/7`)
28 mm
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`)
In a circle of radius 21 cm, an arc subtends an angle of 60° at the centre. The length of the arc is
Find the area of the circle if its circumfence is 88 cm.
A wire when bent in the form of a square encloses an area of 484 cm2. If the same wire is bent into the form of a circle, find the area of the circle.
A hollow metallic cylindrical tube has an internal radius of 3.5 cm and height 21 cm. The thickness of the metal tube is 0.5 cm. The tube is melted and cast into a right circular cone of height 7 cm. Find the radius of the cone, correct to one decimal place.
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 circumference of a circle is eigth time the circumference of the circle with a radius of 12 cm. Find its diameter.
The diameter of a circular well is 4.2 m. What is its circumference?
