IMO- Mathematics Olympiad Class 9: Questions 419 - 424 of 919

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Question number: 419

» Surface Area and Volumes

MCQ▾

Question

If the height of cone is thrice, then its volume is increased by________.

Choices

Choice (4) Response

a.

200%

b.

300%

c.

500%

d.

900%

Question number: 420

» Surface Area and Volumes

MCQ▾

Question

The altitude drawn to the base of an isosceles triangle is of length 6 cm and the perimeter is 72 cm. the area of the triangle is ________

Choices

Choice (4) Response

a.

480cm2

b.

625cm2

c.

115cm2

d.

105cm2

Question number: 421

» Surface Area and Volumes

MCQ▾

Question

A rectangular field has its length and breadth in the ratio 3:7 . Its area is 10.29 hectares. The cost of fencing it at RS. 8 per meter is ________

Choices

Choice (4) Response

a.

Rs. 15400

b.

Rs. 14200

c.

Rs. 11200

d.

Rs. 21500

Question number: 422

» Surface Area and Volumes

MCQ▾

Question

The volume of the largest circular cone that can be cut of a cube whose edge is 16 cm is ________

Choices

Choice (4) Response

a.

972.76cm3

b.

1272.76cm3

c.

1072.76cm3

d.

1172.76cm3

Question number: 423

» Triangles and Circles

MCQ▾

Question

In the figure AB¯=AC¯ , BAD=30˚ and AE¯=AD¯ . Then x equals ________.

Given the AB equal to AC and AE equal to AD

Given the AB Equal to AC and AE Equal to AD

Given the figure AB equal to AC and AE equal to AD and find the value of x

Choices

Choice (4) Response

a.

121°2

b.

15°

c.

71°2

d.

10°

Question number: 424

» Surface Area and Volumes

MCQ▾

Question

From each corner of a square of side 6 cm a quadrant of a circle of radius 2 cm is cut and also a circle of diameter 4 cm is cut as shown in the figure, then the area of the remaining portion of the square is ________

Given the each corner of a square of side 6 cm

Given the Each Corner of a Square of Side 6 Cm

Given the each corner of a square of side 6 cm a quadrant of a circle of radius 2 cm is cut and also a circle of diameter 4 cm is cut and find the area of the remaining portion of the square

Choices

Choice (4) Response

a.

18.88sq.cm

b.

8.84sq.cm

c.

13.78sq.cm

d.

10.88sq.cm

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