# Surface Area and Volumes (IMO- Mathematics Olympiad Class 9): Questions 78 - 83 of 104

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## Question number: 78

» Surface Area and Volumes

MCQ▾

### Question

How many metres of cloth, 4 m wide, will be required to make a conical tent, the radius of whose base is 14 m and height is 12 m?

### Choices

Choice (4) Response

a.

104.07 m

b.

115.05 m

c.

105.06 m

d.

106.06 m

## Question number: 79

» Surface Area and Volumes

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: 80

» Surface Area and Volumes

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: 81

» Surface Area and Volumes

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: 82

» Surface Area and Volumes

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. 15400

b.

Rs. 14200

c.

Rs. 11200

d.

Rs. 21500

## Question number: 83

» Surface Area and Volumes

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.

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