HARD
9th West Bengal Board
IMPORTANT
Earn 100

The breadth of the rectangle is 44 m, its length is 212 times of its breadth. Find the diameter of the circle, the circumference of which is equal to the perimeter of the rectangle.

Important Questions on Circumference of Circles

HARD
9th West Bengal Board
IMPORTANT
MATHEMATICS CLASS 9>Chapter 20 - Circumference of Circles>EXERCISE-2>Q 2
The difference of the circumference of a circle and its radius is 74 cm. Determine its diameter and circumference.
HARD
9th West Bengal Board
IMPORTANT
MATHEMATICS CLASS 9>Chapter 20 - Circumference of Circles>EXERCISE-2>Q 2
The sum of the length of the circumference of a semi-circular bow and its arrow 216 cm. Find the length of the arrow.
MEDIUM
9th West Bengal Board
IMPORTANT
MATHEMATICS CLASS 9>Chapter 20 - Circumference of Circles>EXERCISE-2>Q 2
A well is drugged on a square field of side 4.2 m. Find the expenditure of fencing round at a rate of ₹10 per meter.
HARD
9th West Bengal Board
IMPORTANT
MATHEMATICS CLASS 9>Chapter 20 - Circumference of Circles>EXERCISE-2>Q 3
The time required to travel a circular field along its diameter is 30 sec less than the time required to travel it along its circumference by a person. If the speed of the person be 60 m per minute, then find the diameter of the circular field. 
HARD
9th West Bengal Board
IMPORTANT
MATHEMATICS CLASS 9>Chapter 20 - Circumference of Circles>EXERCISE-2>Q 3
There is a path around a circular garden. The outer circumference of that path 912 m and the inner circumference is 868 m. Find the breadth of the path.
HARD
9th West Bengal Board
IMPORTANT
MATHEMATICS CLASS 9>Chapter 20 - Circumference of Circles>EXERCISE-2>Q 3
The difference of circumferences of two circles is 22 m and the sum of their radii is 10 m 5 dm. Find the circumferences of the two circles.
MEDIUM
9th West Bengal Board
IMPORTANT
MATHEMATICS CLASS 9>Chapter 20 - Circumference of Circles>EXERCISE-2>Q 3
The circumference of a circle is 112 times of another circle and if the difference of their radii is 21 cm. Find the radii of the two circles.
EASY
9th West Bengal Board
IMPORTANT
MATHEMATICS CLASS 9>Chapter 20 - Circumference of Circles>EXERCISE-2>Q 3
The wheel of a vehicle revolves at a rate of 500 times per minute. If the velocity of the vehicle be 6 km and 6 hemi per hour, then find the diameter of the wheel in dm.