The radius of a circle is increased to 4 times, then the ratio of the square of new circumference to the new area will be

The radius of a circle is increased to 4 times, then the ratio of the square of new circumference to the new area will be
1). 2π ∶ 1
2). π ∶ 2
3). 4π ∶ 1
4). 1 ∶ 2π

---

Join Telegram Group

Answer This Question
Name:
Email:
Answer :
Sum of (2+4)
Submit:

Other Questions

1. A wire when bent in the form of a square encloses an area of 484 sq.cm. What will be the enclosed area when the same wire is bent into the form of a circle? (Take \(\pi = \frac{{22}}{7}\)) 

2. Calculate the area (in cm2) of a circle of radius 17.5 cm.

3. The perimeter of a rhombus is 100 cm. If one of its diagonals is 14 cm, then the area of the rhombus is

4. A hollow cylindrical tube 20 cm long, is made of iron and its external and internal diameters are 8 cm and 6 cm respectively.The volume of iron used in making the tube is (p = $\frac{22}{7}$)

5. Acylinder with base radius 8 cm and height 2cm is melted to form a cone of height 6 cm. The radius of the cone will be

6. Two circular cylinders of equal volume have their heights in the ratio 1 : 2. Ratio of their radii is (Take $\pi$ = $\frac{22}{7}$)

7. A sphere and a hemisphere have the same volume. The ratio of their radii is

8. The area of the circle with radius Y is W. The difference between the areas of the bigger circle (with radius Y) and that of the smaller circle (with radius X) is W'. So x/y is equal to

9. What is the cost of ploughing a square field of dimensions 45 m × 45 m at a rate of Rs. 24 per m2?

10. long, 16.6 metres broad and 4 metres deep can be filled by the earth got by digging a cyltndrical tunnel of diameter 4 metres and length 56 metres (Use $\pi$ = $\frac{22}{7}$)