# IMO Level 1- Mathematics Olympiad (SOF) Class 9: Questions 415 - 421 of 929

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## Question number: 415

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MCQ▾

### Question

The area of an isosceles triangle having base x cm and one side y cm is________

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 416

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MCQ▾

### Question

Which of the points A (0,6), B (-2,4), C (-4,0), D (0, -2), E (0, -5), F (4, -4) do lie on the Quadrant 1 and 4?

### Choices

Choice (4) Response

a.

Q, R, W, U and T

b.

P, S, W, U and R

c.

P, R, T, U and X

d.

Q, R, T, V and X

## Question number: 417

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MCQ▾

### Question

If the height of cone is thrice, then its volume is increased by________.

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 418

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MCQ▾

### Question

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 number: 419

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MCQ▾

### Question

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

### Choices

Choice (4) Response

a.

Rs. 21500

b.

Rs. 15400

c.

Rs. 14200

d.

Rs. 11200

## Question number: 420

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MCQ▾

### Question

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 number: 421

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MCQ▾

### Question

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

### Choices

Choice (4) Response

a.

b.

c.

d.