# IMO Level 1- Mathematics Olympiad (SOF) Class 9: Questions 289 - 295 of 931

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## Question 289

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### Question

MCQ▾

is a point, which belongs to the line________.

### Choices

Choice (4)Response
a.
b.
c.
d.

## Question 290

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### Question

MCQ▾

If the coordinate of the two points are P (4, -5) and Q (-2,3) then ________

### Choices

Choice (4)Response
a.-2
b.-5
c.-3
d.-4

## Question 291

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### Question

MCQ▾

The radii of two cones are in ration 3: 1, their volumes are equal. Find the ratio of their heights.

### Choices

Choice (4)Response
a.
b.
c.
d.

## Question 292

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### Question

MCQ▾

A solid consists of a circular cylinder with an exact fitting right circular cone placed on the top. The height of a the cone is h. If the total volume of the solid is three times the volume of the cone, then the height of the cylinder is ________

### Choices

Choice (4)Response
a.
b.
c.
d.

## Question 293

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### Question

MCQ▾

The area of rhombus is and one of its diagonals is 8 cm. Its perimeter is ________

### Choices

Choice (4)Response
a.
b.
c.
d.

## Question 294

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### Question

MCQ▾

Centroid of a triangle is the point of concurrency of its ________

### Choices

Choice (4)Response
a.Triangle
b.Perpendicular bisectors
c.Medians
d.Angle

## Question 295

Edit

### Question

MCQ▾

216 plastic balls each of radius r are melted together to from one big sphere of radius R. then the ratio of surface area of the big sphere to that of a ball is ________

### Choices

Choice (4)Response
a.9
b.36
c.
d.