IMO- Mathematics Olympiad (SOF) Class 9: Questions 292 - 297 of 919

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Question number: 292

» Surface Area and Volumes

MCQ▾

Question

The radii of two cones are in ration 3: 1, their volumes are equal. Find the ratio of their heights.

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 293

» Surface Area and Volumes

MCQ▾

Question

A solid consists of a circular cylinder with an exact fitting right circular cone placed on the top. The height of a the cone is h. If the total volume of the solid is three times the volume of the cone, then the height of the cylinder is ________

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 294

» Surface Area and Volumes

MCQ▾

Question

The area of rhombus is and one of its diagonals is 8 cm. Its perimeter is ________

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 295

» Triangles and Circles

MCQ▾

Question

Centroid of a triangle is the point of concurrency of its ________

Choices

Choice (4) Response

a.

Angle

b.

Perpendicular bisectors

c.

Medians

d.

Triangle

Question number: 296

» Surface Area and Volumes

MCQ▾

Question

216 plastic balls each of radius r are melted together to from one big sphere of radius R. then the ratio of surface area of the big sphere to that of a ball is ________

Choices

Choice (4) Response

a.

36

b.

c.

9

d.

Question number: 297

» Surface Area and Volumes

MCQ▾

Question

The base and height of the triangle are in the ratio. The area of the triangle is , then height of triangle = ________

Choices

Choice (4) Response

a.

20 cm

b.

22 cm

c.

18 cm

d.

19 cm

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