Advertisements
Advertisements
प्रश्न
Find the following ratio.
The ratio of circumference of circle with radius r to its area.
Advertisements
उत्तर
Radius of the circle = r units
∴ Circumference of the circle = 2πr units
Area of the circle = πr2 square units
Circumference of the circle: Area of the circle
`= 2πr : πr^2`
`= (2πr)/(πr^2)`
`= 2/r`
= 2 : r
Thus, the ratio of circumference of circle with radius r to its area is 2 : r.
APPEARS IN
संबंधित प्रश्न
From the following pair of numbers, find the reduced form of ratio of first number to second number.
38, 57
From the following pair of numbers, find the reduced form of ratio of first number to second number.
52, 78
Find the reduced form of the ratio of the first quantity to the second quantity.
3 years 4 months, 5 years 8 months
Express the following percentage as ratio in the reduced form.
75 : 100
Express the following percentage as ratio in the reduced form.
44 : 100
Express the following percentage as ratios in the reduced form.
6.25%
Express the following percentage as ratio in the reduced form.
0.64%
Convert the following ratio into percentage.
47 : 50
Convert the following ratio into percentage.
`7/16`
Present ages of Vatsala and Sara are 14 years and 10 years respectively. After how many years the ratio of their ages will become 5 : 4?
The ratio of two numbers is 31 : 23 and their sum is 216. Find these numbers.
What is the mean proportional of 4 and 25?
Convert the following ratio into percentage.
37 : 500
Convert the following ratio into percentage.
`5/8`
Convert the following ratio into percentage.
`144/1200`
Write the ratio of first quantity to second quantity in the reduced form.
17 Rupees, 25 Rupees 60 paise
Write the ratio of first quantity to second quantity in the reduced form.
5 dozen, 120 units
