Measurements

Formula used to find the circumference of a circle is
1. 2πr units
2. $π r^{2}$ units
3. $2 π r^{2}$ units
4. $2 π r^{3}$ units
In the formula, C = 2πr , ‘r’ refers to
1. circumference
2. Area
3. Rotation
4. Radius
the circumference of a circle is 82π , then the value of ‘r’ is
1. 41 cm
2. 82 cm
3. 21 cm
4. 20 cm
Circumference of a circle is always
1. three times of its diameter
2. more than three times of its diameter
3. less than three times of its diameter
4. three times of its radius
Find the circumference of the circles whose radii is 49 cm
1. 308
2. 306
3. 302
4. 300
The diameter of a circular well is 4m. What is its circumference
1. 14.56 m
2. 15.56 m
3. 12.56 m
4. 13.56 m
The diameter of the bullock cart wheel is 1.4 m. Find the distance covered by it in 150 rotations?
1. 660
2. 500
3. 480
4. 780
The radius of a tractor wheel is 77 cm. Calculate the distance covered by it in 35 rotations?
1. 17490 cm
2. 16940 cm
3. 16950 cm
4. 17940 cm
The formula used to find the area of the circle is ________ sq.units.
The ratio of the area of a circle to the area of its semicircle is
1. 2:1
2. 1:2
3. 4:1
4. 1:4
Area of a circle of radius ‘n’ units is
Find the area of the circle of radius 7 cm ?
1. 154 cm
2. 156 cm
3. 158 cm
4. 160cm
Find the area of a hula loop whose diameter is 28 cm
1. 616
2. 716
3. 816
4. 516
The formula to find the area of the circular path is
The formula used to find the area of the rectangular path is
2. (L × B) − (l × b) sq. units
3. LB sq. units
4. lb sq. units
The formula to find the width of the circular path is
1. (L− l) units
2. (B− b) units
3. (R− r) units
4. (r− R) units
A park is circular in shape. The central portion has playthings for kids surrounded by a circular walking pathway. Find the walking area whose outer radius is 10 m and inner radius is 3 m.
1. 276
2. 286
3. 296
4. 306
Find the area of a circular pathway whose outer radius is 32 cm and inner radius is 18 cm
1. 2200
2. 3200
3. 4200
4. 5200
If the circumference of the circle is 264 m. Then calculate the radius
1. 42
2. 84
3. 41
4. 82
If distance covered in one rotation is 100 cm then distance covered in 1000 rotations
1. 10000
2. 100000
3. 1000000
4. 10000000
The circumference of the quadrant arc is
1. πr
2. 1/3×2πr
3. 1/4×2πr
4. 2πr
A wire of length 1320 cm is made into circular frames of radius 7 cm each. How many frames can be made?
1. 30
2. 20
3. 10
4. 40
π approximate value is
1. 3.14
2. 3.24
3. 3
4. 3.07
The circumference of a circular park is 352 m. Find the area of the park
1. 9856
2. 8856
3. 7856
4. 6856
A picture of length 24 cm and breadth 12 cm is painted on a chart, such that there is a margin of 4 cm along each of its sides. Find the total area of the margin.
1. 224
2. 234
3. 244
4. 255
A floor is 10 m long and 6 m wide. A carpet of size 8 m long and 5 m wide is laid on the floor. Find the area of the floor that is not covered by the carpet.
1. 10
2. 20
3. 40
4. 50
A farmer wants to fence his circular poultry farm with barbed wire whose radius is 350 m. The cost of fencing is ₹10 per metre. He has ₹20,000 with him. How much more amount will be needed to fence his farm?
1. ₹4,000
2. ₹3,000
3. ₹2,000
4. ₹1,000
What is the distance travelled by the tip of the seconds hand of a clock in 1 minute, if the length of the hand is 56 mm
1. 252
2. 352
3. 350
4. 250