# Surface Area and Volumes (IMO- Mathematics Olympiad Class 9): Questions 53 - 56 of 104

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## Question number: 53

» Surface Area and Volumes

MCQ▾

### Question

A spherical ball of lead, 3 cm in diameter is melted and recast into three spherical balls. The diameter of two of these is 1.5 cm and 2 cm respectively. The radius of the third ball is________.

### Choices

Choice (4) Response

a.

3 cm

b.

2.5 cm

c.

3.5 cm

d.

2.66 cm

## Question number: 54

» Surface Area and Volumes

MCQ▾

### Question

ABC is triangle in which BE, CF are medians. If , and , then the area of is________

### Choices

Choice (4) Response

a.

240

b.

120

c.

102

d.

360

## Question number: 55

» Surface Area and Volumes

MCQ▾

### Question

The area of a quadrilateral JKLM, in which, is an equilateral triangles of side 20 cm and is________.

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 56

» Surface Area and Volumes

MCQ▾

### Question

A wooden article was made by scooping out a hemisphere from each end of a solid cylinder. If the height of the cylinder is 20 cm, and its base is of radius 7.5 cm, find the total surface area of the article.

### Choices

Choice (4) Response

a.

b.

c.

d.

f Page