TYPE 2
A garden roller has a circumference of 3 metres. How many revolutions does it make in the
moving 210 meters?
The minute hand and hour hand of a clock are 21 cm and 7cm respectively. How much
22 

distance does the tip of the minute covers more than the hour hand in 3days.  π  
7 

A bucket is lowered in to the well by the means of the rope and a fixed pulley. A bucket
filled with the water is raised to a height of 22m by this system. Find the diameter of the
22 

pulley if its makes 25 revolutions during the ascent.  π  
7 

A bucket is raised from a well be means of a rope, which is wound round a wheel of diameter
77cm. Given that the bucket ascends in 1 minute 28 seconds with a uniform speed of 1.1
m/sec, calculate the number of complete revolutions the wheel makes in raising the bucket
22 

π  
7 

TYPE 3
The area of ring is 594cm2. If the radius of the bigger circle is 17cm, find the radius of the
22 

smaller circle.  π  
7 

The sum of the inner and outer circumferences of a circular road is 770m. If the area of the
22 

road is 1540m2, find its width.  π  
7 

The area of the circular field is 1756m2. Around it there is a circular path which has been
built at the cost of `20,940 at the rate of `10 per m2 . Find the radius of the outer circle.
22 

π  
7 

Area of the circular ring enclosed between two concentric circles is 286cm2. Find the
22 

diameters of the circles if their difference is 14cm.  π  
7 
