The Biotic World

Tick the correct answer in the following : Area of a sector of angle p (in degrees) of a circle with radius R is ?

The Biotic World  is the best free Educational Website for Students.  The Biotic World  Provides  NCERT Solution PDF ,  C…

byAmlesh Mahato •October 16, 2021

A round table cover has six equal designs as shown in Fig. 12.14. If the radius of the cover is 28 cm, find the cost of making the designs at the rate of ` 0.35 per cm2 ? (Use √ 3 = 1.7)

The Biotic World  is the best free Educational Website for Students.  The Biotic World  Provides  NCERT Solution PDF ,  C…

byAmlesh Mahato •September 16, 2021

To warn ships for underwater rocks, a lighthouse spreads a red colored light over a sector of angle 80° to a distance of 16.5 km. Find the area of the sea over which the ships are warned ? (Use π = 3.14)

The Biotic World  is the best free Educational Website for Students.  The Biotic World  Provides  NCERT Solution PDF ,  C…

byAmlesh Mahato •September 16, 2021

A car has two wipers which do not overlap. Each wiper has a blade of length 25 cm sweeping through an angle of 115°. Find the total area cleaned at each sweep of the blades ?

The Biotic World  is the best free Educational Website for Students.  The Biotic World  Provides  NCERT Solution PDF ,  C…

byAmlesh Mahato •September 16, 2021

An umbrella has 8 ribs which are equally spaced (see Fig. 12.13). Assuming umbrella to be a flat circle of radius 45 cm, find the area between the two consecutive ribs of the umbrella.

The Biotic World  is the best free Educational Website for Students.  The Biotic World  Provides  NCERT Solution PDF ,  C…

byAmlesh Mahato •August 25, 2021

A brooch is made with silver wire in the form of a circle with diameter 35 mm. The wire is also used in making 5 diameters which divide the circle into 10 equal sectors as shown in Fig. 12.12. Find : (i) the total length of the silver wire required. (ii) the area of each sector of the brooch.

The Biotic World  is the best free Educational Website for Students.  The Biotic World  Provides  NCERT Solution PDF ,  C…

byAmlesh Mahato •August 16, 2021