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प्रश्न
In the formula, C = 2πr, ‘r’ refers to
विकल्प
circumference
area
rotation
radius
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उत्तर
In the formula, C = 2πr, ‘r’ refers to radius
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संबंधित प्रश्न
In Fig. 9, is shown a sector OAP of a circle with centre O, containing ∠θ. AB is perpendicular to the radius OQ and meets OP produced at B. Prove that the perimeter of shaded region is
`r[tantheta+sectheta+(pitheta)/180-1]`
If the perimeter of a semi-circular protractor is 66 cm, find the diameter of the protractor (Take π = 22/7).
The circumference of a circle exceeds the diameter by 16.8 cm. Find the radius of the circle.
The perimeter of a sector of a circle of radius 5.2 cm is 16.4 cm. Find the area of the sector.
Given figure depicts an archery target marked with its five scoring areas from the centre outwards as Gold, Red, Blue, Black and White. The diameter of the region representing Gold score is 21 cm and each of the other bands is 10.5 cm wide. Find the area of each of the five scoring regions. [use π = 22/7]
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)
Diameter of the circular garden is 42 m. There is a 3.5 m wide road around the garden. Find the area of the road.
The cost of fencing a circular field at the rate of Rs.250 per metre is Rs.55000. The field is to be ploughing at the rate of Rs.15 per m2. Find the cost of ploughing the field.
Diameters of different circles are given below. Find their circumference (Take π = `22/7`)
d = 28 mm
Is it true that the distance travelled by a circular wheel of diameter d cm in one revolution is 2 π d cm? Why?
