IMO- Mathematics Olympiad (SOF) Class 9: Questions 314 - 318 of 919

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Question number: 314

» Surface Area and Volumes

MCQ▾

Question

A bus stop is barricaded from the remaining part of the road, by using 75 hollow cones made of recycled cardboard. Each cone has a base diameter of 60 cm and height 1 m. If the outer side of each of the cones is to be painted and the cost of painting is Rs. 17 per m2, what will be the cost of painting all these cones? (Use and take)

Choices

Choice (4) Response

a.

Rs. 1645

b.

Rs. 1742

c.

Rs. 1224

d.

Rs. 1586

Question number: 315

» Surface Area and Volumes

MCQ▾

Question

The volume of the largest circular cone that can be cut of a cube whose edge is 8 cm is ________

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 316

» Surface Area and Volumes

MCQ▾

Question

A circular park of 80 metre diameter has a circular path just inside the boundary of width 8 metre. The area of path is ________

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 317

» Coordinate Geometry

MCQ▾

Question

Which of the points A (0,3), B (1,0), C (0, -1), D (-5,0), E (1,2) do not lie on the x-axis?

Choices

Choice (4) Response

a.

B and D only

b.

B, C, E

c.

A and E only

d.

A, C, E

Question number: 318

» Surface Area and Volumes

MCQ▾

Question

If the volumes of two cones are in the ratio 2: 3 and their diameters are in the ratio 3: 7, and then the ratio of their heights is ________

Choices

Choice (4) Response

a.

b.

c.

d.

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