# NCERT Class 10 Chapter 12 Areas Related to Circles CBSE Board Sample Problems Very Short Answer

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## Question

**The circumference of a circle is equal to sum of circumference of 2 circles having diameter 34 cm and 28 cm. Find the radius of the new circle.**

### Solution

Let radius of new circle be r cm

## Question

**A race track is in the form of a ring whose inner and outer circumference are 437m and 503m respectively. Find the width of the track.**

### Solution

amid

and

Width of the track

## Question

**The radius of a bicycle wheel is 14cm. Find the distance covered by the wheel after 50 complete rotations.**

### Solution

Circumference

= 88cm

Distance covered in 50 rotations

## Question

**Find the radius of the circle whose area is numerically equal to three times its circumference.**

### Solution

## Question

**Find the perimeter of a protractor having length of its base as 14 cm.**

### Solution

Perimeter