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.

x2y2x22cm2

b.

x24y2x24cm2

c.

x2y24cm2

d.

x4y2x2cm2

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.

200%

b.

300%

c.

500%

d.

900%

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.

480cm2

b.

625cm2

c.

115cm2

d.

105cm2

Question number: 82

» Surface Area and Volumes

MCQ▾

Question

A rectangular field has its length and breadth in the ratio 3:7 . 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.

972.76cm3

b.

1272.76cm3

c.

1072.76cm3

d.

1172.76cm3

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