Mathematics MCQs

Page No. 29

If the base of rectangle is increased by 10 % and the area is unchanged then the corresponding altitude must be decreased by:________?


a9 1/11 %

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b10%

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c11%

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d11 1/9 %

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View Answer 9 1/11 %

If the diagonal of a square is doubled. How does the area of the square change?


aBecomes fourfold

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bBecomes threefold

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cBecomes twofold

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dnone of the above

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View Answer Becomes fourfold

Area of a square with side x is equal to the area of a triangle with base x. The altitude of the triangle is:________?


ax/2

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bx

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c2x

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d4x

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View Answer 2x

If the circumference of a circle is 352 meters then its area in Sq.m is:________?


a9856

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b8956

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c6589

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d5986

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View Answer 9856

If the radius of a circle be reduced by 50% its area is reduced by:_________?


a25 %

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b50%

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c75%

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d100%

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View Answer 75%

If the diameter of a circle is increased by 100 % its area is increased by:_________?


a100%

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b200%

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c300%

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d400%

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View Answer 300%

A circular wire of radius 42 cm is cut and bent in the form of a rectangle whose sides are in the ration of 6:5 The smaller side if the rectangle is:_________?


a30 cm

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b60 cm

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c72 cm

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d132 cm

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View Answer 60 cm

The number of rounds that a wheel of diameter 7/11 m will make in going 4 km is:_________?


a1000

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b1500

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c1700

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d2000

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View Answer 2000

The diameter of a circle is 105 cm less than the circumference what is the diameter of the circle?


a44 cm

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b46 cm

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c48 cm

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d49 cm

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View Answer 49 cm

The circumferences of two concentric circles are 176 m and 132 cm respectively. What is the difference between their radii?


a5 m

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b7 m

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c8 m

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d44 m

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View Answer 7 m

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