# IMO Level 1- Mathematics Olympiad (SOF) Class 9: Questions 308 - 313 of 929

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## Question number: 308

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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: 309

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### Question

Triangle AXY is formed by three tangents to circle with center Z and , then angle XYZ equals ________ Image of Triangle AXY is Formed by Three Tangents to Circle

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 310

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### 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.

200 feet

b.

280 feet

c.

230 feet

d.

260 feet

## Question number: 311

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### Question

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

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 312

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MCQ▾

### Question

In the given figure, and QS, RS are the bisectors of and , then ________

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 313

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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. 1586

d.

Rs. 1224

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