Find the radius of the circle if the area of its sector is 30.8 sq cm whose corresponding central angle is 72°?

Find the radius of the circle if the area of its sector is 30.8 sq cm whose corresponding central angle is 72°?
1). 3.5 cm
2). 7 cm
3). 14 cm
4). 10.5 cm

SSC CGL Books

---

Join Telegram Group

Answer This Question
Name:
Email:
Answer :
Sum of (5+4)
Submit:

Other Questions

1. The sides of a triangle are in the ratio $\frac{1}{3}:\frac{1}{4}:\frac{1}{5}$ and its perimeter is 94cm. The length of the smallest side of the triangle is:

2. The perimeter of a rhombus is 40 cm and the measure of an angle is $60^{0}$, then the area of it is :

3. Three circles of radii 3.5 cm, 4.5 cm and 5.5 cm touch each otherexternally. Then the perimeter of the triangle formed by Joining the centres of the circles, in cm, is

4. D and E are points on side AB and AC of $\triangle ABC$. DE is parallel to BC. If AD:DB = 1:2 and area of $\triangle ABC$ is 45 sq cm, what is the area (in sq cm) of quadrilateral BDEC?

5. A surface area of a sphere has three times the surface area of a cube. Then, the ratio of the volume of sphere to that of the cube is 

6. What would be the area of a rectangle whose area is equal to the area of a circle of radius 7 cm ?

7. Points P and Q lie on side AB and AC of triangle ABC respectively such that segment PQ is parallel to side BC. If the ratio of AP:PB is 2:5, and area of $\triangle$ APQ is 4 sq cm, what is the area of trapezium PQCB?

8. ΔABC and ΔDEF are two similar triangles and the perimeter of ΔABC and ΔDEF are 30 cm and 18 cm respectively. If length of DE = 36 cm, then length of AB is

9. If the length of a side of the square is equal to that of the diameter of a circle, then the ratio of the area of the square and that of the circle is ($\pi$ = $\frac{22}{7}$)

10. The total surface area of a right circular cylinder is 23100 cm2 and its volume is _______ cm3. The ratio of curved surface area of the cylinder to the total area of its two bases is 2 : 1.