Advertisements
Advertisements
Question
Find the following ratio.
The ratio of circumference of circle with radius r to its area.
Advertisements
Solution
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
RELATED QUESTIONS
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 second quantity.
₹ 14, ₹ 12. 40 paise
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 a ratio in the reduced form.
52 : 100
Convert the following ratio into percentage.
`7/10`
Find the following ratio.
The ratio of diagonal of a square to its side, if the length of side is 7 cm.
The ratio of present ages of Albert and Salim is 5 : 9. Five years hence ratio of their ages will be 3 : 5. Find their present ages.
The ratio of two numbers is 31 : 23 and their sum is 216. Find these numbers.
If the product of two numbers is 360 and their ratio is 10 : 9, then find the numbers.
The ages of Jatin, Nitin and Mohasin are 16, 24 and 36 years respectively. What is the ratio of Nitin’s age to Mohasin’s age?
For the following numbers write the ratio of first number to second number in the reduced form.
21, 48
For the following numbers write the ratio of first number to second number in the reduced form.
65, 117
For the following numbers write the ratio of first number to second number in the reduced form.
138, 161
For the following numbers write the ratio of first number to second number in the reduced form.
114, 133
Write the following ratio in the reduced form.
Radius to the diameter of a circle.
Convert the following ratio into percentage.
`5/8`
Write the ratio of first quantity to second quantity in the reduced form.
5 dozen, 120 units
