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

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 919 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 450.00 or

## Question number: 308

MCQ▾

### Question

The volume of a sphere is the curved surface of its sphere is ________

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 309

MCQ▾

### Question

The area of a quadrilateral PQRS, in which, is an equilateral triangles of side 12 cm and is________.

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 310

MCQ▾

### Question

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

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 311

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

MCQ▾

### Question

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

### Choices

Choice (4) Response

a.

b.

c.

d.

f Page