Q21 of 157 Page 846

The area of a sector of angle θ° of a circle with radius R is

Area of a sector of angle of a circle with radius R = area of circle ×


=

More from this chapter

All 157 →
19

The diameter of a wheel is 40 cm. How many revolutions will it make in covering 176 m?

 20

In making 1000 revolutions, a wheel covers 88 km. The diameter of the wheel is

 22

The length of an arc of a sector of angle θ° of a circle with radius R is

 23

The length of the minute hand of a clock is 21 cm. The area swept by the minute hand in 10 minutes is