# NCO- Cyber Olympiad (SOF) Class 10: Questions 21 - 24 of 461

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## Question number: 21

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MCQ▾

### Question

The minute hand of a clock is 20 cm long. Find the area of the face of the clock described by the minute hand between 8 AM and 8.35 AM.

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 22

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MCQ▾

### Question

In the given question a square sheet of paper has been folded and punched as shown. How would the paper look like when unfolded?

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 23

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MCQ▾

### Question

Find the mean marks of students from the following cumulative frequency table:

 Marks Number of Students 0 and above10 and above20 and above30 and above40 and above50 and above60 and above70 and above80 and above90 and above100 and above 60585246363228221660

### Choices

Choice (4)Response

a.

55

b.

54.33

c.

51.2

d.

56.89

## Question number: 24

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MCQ▾

### Question

20 liters of a mixture contains 10 % water and the rest orange juice. If 3 liters of orange juice be mixed in it, the percentage of water in the new mixture will be

### Choices

Choice (4)Response

a.

20%

b.

%

c.

d.

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