# IMO- Mathematics Olympiad Class 10: Questions 728 - 731 of 958

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## Question number: 728

MCQ▾

### Question

A cylindrical vessel of diameter is partly filled with water. 400 lead balls are dropped in it. The rise in water level is The diameter of each ball is ________.

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 729

MCQ▾

### Question

A car is moving with the speed of 26 decimeter per second. If it performs 21 revolutions per second, the diameter of the wheel is ________.

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 730

MCQ▾

### Question

is a line segment of length O is the mid-point of Circle are drawn with P, O and Q as centers and radii (see figure). The area of the colored portion (in) is________.

### Choices

Choice (4) Response

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b.

c.

d.

## Question number: 731

MCQ▾

### Question

A cuboidal metal of dimensions was melted and cast into a cylinder of height Its radius is________.

### Choices

Choice (4) Response

a.

b.

c.

d.

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