IMO- Mathematics Olympiad Class 9: Questions 308 - 312 of 919

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Question number: 308

» Surface Area and Volumes

MCQ▾

Question

The volume of a sphere is 8821×213cm3 the curved surface of its sphere is ________

Choices

Choice (4) Response
a.

2424cm2

b.

5544cm2

c.

2484cm2

d.

5446cm2

Question number: 309

» Surface Area and Volumes

MCQ▾

Question

The area of a quadrilateral PQRS, in which PQS=90˚ , QRS is an equilateral triangles of side 12 cm and PS=15cm is________.

Choices

Choice (4) Response
a.

416.35cm2

b.

216.49cm2

c.

316.41cm2

d.

116.35cm2

Question number: 310

» Triangles and Circles

MCQ▾

Question

Triangle AXY is formed by three tangents to circle with center Z and XAY=60˚ , then angle XYZ equals ________

Image of triangle AXY is formed by three tangents to circle

Image of Triangle AXY Is Formed by Three Tangents to Circle

Triangle AXY is formed by three tangents to circle with center Z then find the angle XYZ equals value

Choices

Choice (4) Response
a.

65°

b.

55°

c.

80°

d.

60°

Question number: 311

» Triangles and Circles

MCQ▾

Question

A running track is the ring formed by two concentric circles. It is 45 feet wide. The circumferences of the two circles differ by about ________

Choices

Choice (4) Response
a.

230 feet

b.

200 feet

c.

260 feet

d.

280 feet

Question number: 312

» Surface Area and Volumes

MCQ▾

Question

If the altitude of an equilateral triangle is 56cm , its area is ________

Choices

Choice (4) Response
a.

613cm2

b.

473cm2

c.

602cm2

d.

503cm2

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