# 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.

## Question

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

Perimeter

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