Arithmeticmedium · Past Paper
The ratio of the radii of two circles is 2:3. Find the ratio of their areas.
A2:3
B4:9
Csqrt(2):sqrt(3)
D8:27
✓ Correct Answer: B — 4:9
Area of a circle is proportional to the square of its radius. Ratio = 2^2 : 3^2 = 4:9.
Share this question
More from Arithmetic
- Find 200% of 20.
- If the MP of an object is Rs. 100 and it is sold for Rs. 85, the discount rate is:
- The difference between SI and CI for 2 years at 5% p.a. is Rs 2.50. Find the sum.
- If (x+y):(x-y) = 4:1, find (x^2+y^2):(x^2-y^2).
- What is the single equivalent discount for successive discounts of 10% and 20%?