The sum of areas of two circles A and b is equal to the area of a third circle C whose diameter is 30 cm. If the diameter of a circle A is 18 cm, then the radius of circle B is:

1.  10 cm  

2.  12 cm

3.  15 cm

4.  18 cm

View Answer  
4
Correct Answer :

12 cm


Explanation :
No Explanation available for this question

Between a square of perimeter 44 cm and a circle circumference 44 cm. Which figure has larger area and by how much

1.   Both have equal area

2.  Square, 33 cm2

3.   Circle, 33 cm2

4.  Square, 495 cm2

View Answer  
4
Correct Answer :

Circle, 33 cm2


Explanation :
No Explanation available for this question

A wire can be bent in the form of a circle of radius 56 cm. If it is bent in the form of a square, then its area will be:

1.   3520 cm2

2.  6400 cm2

3.  7744 cm2

4.   8800 cm2

View Answer  
4
Correct Answer :

7744 cm2


Explanation :
No Explanation available for this question

A wire was bent in the form of a square enclose an area of 484 sq.cm. What will be the enclosed area when the same wire is bent into the form of a circle

1.   462sq.cm

2.  539sq.cm

3.  616sq.cm

4.  693sq.cm

View Answer  
4
Correct Answer :

616sq.cm


Explanation :
No Explanation available for this question

A circular wire of radius 42 cm is bent in the form of a rectangle whose sides are in the ratio of 6:5. The smaller side of the rectangle is

1.  25 cm

2.  30 cm

3.  36 cm

4.  60 cm

View Answer  
4
Correct Answer :

60 cm


Explanation :
No Explanation available for this question

There is a rectangle tank of length 180 m and breadth 120 m in a circular field. If the area of the land portion of the field is 40000 m2, what is the radius of the field

1.  130 cm

2.  135 cm

3.  140 cm

4.  145 cm

View Answer  
4
Correct Answer :

140 cm


Explanation :
No Explanation available for this question

The areas of two circular fields are in the ratio 16:49. If the radius of the latter is 14 m, then what is the radius of the former

1.   4 m

2.  8 m

3.  18 m

4.  32 m

View Answer  
4
Correct Answer :

8 m


Explanation :
No Explanation available for this question

If the ratio of the areas of two circles is 4:9, then the ratio of their circumferences will be:

1.   2:3

2.  3:2

3.   4:9

4.  9:4

View Answer  
4
Correct Answer :

2:3


Explanation :
No Explanation available for this question

The perimeter of a circle is equal to the perimeter of a square. Then, their areas are in the ratio:

1.   4:1

2.  11:7

3.   14:11

4.  22:7

View Answer  
4
Correct Answer :

14:11


Explanation :
No Explanation available for this question

The diameter of a wheel is 1:26m. How far will it travel in 500 revolutions

1.  1492 m

2.  1980 m

3.  2880 m

View Answer  
3
Correct Answer :

1980 m


Explanation :
No Explanation available for this question
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