# IMO Level 1- Mathematics Olympiad (SOF) Class 10: Questions 777 - 780 of 968

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## Question number: 777

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Data Sufficieny▾

### Question

What is the total surface area of the cone?

### Statements

1. The area of the base of the cone is

2. The curved surface area of the cone is

3. The volume of the cone is

### Choices

Choice (4)Response

a.

Either one of the statements is sufficient.

b.

Either statement Ⅱ or statement Ⅲ is sufficient & only statement Ⅰ is sufficient, while others are not sufficient.

c.

All of the statements are sufficient.

d.

Both statement Ⅰ & statement Ⅲ are sufficient.

## Question number: 778

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MCQ▾

### Question

A bucket is in the form of a frustum of a cone, its depth is and the diameters of the top and the bottom are and respectively. Find how many liters the bucket can hold.

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 779

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MCQ▾

### Question

The number of solid spheres, each of diameter that could be moulded to form a solid metal cylinder of height and diameter is________.

### Choices

Choice (4)Response

a.

4.64

b.

3.55

c.

6.45

d.

5.22

## Question number: 780

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MCQ▾

### Question

CD subtends at the center of the semi-circle. The sides SR and RT of a triangle RST meet the semicircle in C and D respectively. ST is the diameter of a semicircle. The is ________.

### Choices

Choice (4)Response

a.

b.

c.

d.

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