# CBSE Class 10-Mathematics: Chapter –12 Areas Related to Circles Part 14

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**Question 41:**

Find the area of a sector of a circle with radius 6cm if angle of the sector is .

**Answer:**

We know that Area of sector

Here,

Required area

**Question 42:**

A wheel has diameter , find how many complete revolutions it must make to complete meters.

**Answer:**

Diameter, Distance covered in one revolution circumference

Thus, for distance covered 264cm, number of revolution

Number of revolutions

**Question 43:**

The given figure is a sector of a circle of radius . Find the perimeter of the sector.

**Answer:**

We know that circumference i. e, perimeter of a sector of angle of a circle with radius R

Required perimeter

**Question 44:**

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

**Answer:**

Radius of each wiper , Angle

Total area cleaned at each sweep of the blades

**Question 45:**

In the given figure arcs have been drawn with radii each and with centres P, Q and R. Find the area of the shaped region.

**Answer:**

Area of shaded region