# IMO Level 1- Mathematics Olympiad (SOF) Class 9: Questions 418 - 423 of 931

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## Question 418

### Question

MCQ▾

The altitude drawn to the base of an isosceles triangle is of length 6 cm and the perimeter is 72 cm. the area of the triangle is ________

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question 419

### Question

MCQ▾

A rectangular field has its length and breadth in the ratio . Its area is 10.29 hectares. The cost of fencing it at ₹ . 8 per meter is ________

### Choices

Choice (4)Response

a.

₹ 21500

b.

₹ 15400

c.

₹ 14200

d.

₹ 11200

## Question 420

### Question

MCQ▾

The volume of the largest circular cone that can be cut of a cube whose edge is 16 cm is ________

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question 421

### Question

MCQ▾

In the figure , and . Then x equals ________. Given the AB Equal to AC and AE Equal to AD

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question 422

### Question

MCQ▾

From each corner of a square of side 6 cm a quadrant of a circle of radius 2 cm is cut and also a circle of diameter 4 cm is cut as shown in the figure, then the area of the remaining portion of the square is ________ Given the Each Corner of a Square of Side 6 Cm

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question 423

### Question

MCQ▾

A line passed through the point (3,6) and has gradient . Find the y-coordinate of a point on the line when x = 11. Find the Y-Coordinate of a Point on the Line when X = 11

### Choices

Choice (4)Response

a.

14

b.

13

c.

15

d.

12