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Secondary School (English Medium) (5 to 8) इयत्ता ८ - CBSE Question Bank Solutions

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Find the value of:

\[\frac{\sqrt{1587}}{\sqrt{1728}}\]

[5] Squares and Square Roots
Chapter: [5] Squares and Square Roots
Concept: undefined >> undefined

Find the value of:

`sqrt72 xx sqrt338`

[5] Squares and Square Roots
Chapter: [5] Squares and Square Roots
Concept: undefined >> undefined

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In which of the following table x and y vary inversely: 

x 4 3 12 1
y 6 8 2 24
[11] Direct and Inverse Proportions
Chapter: [11] Direct and Inverse Proportions
Concept: undefined >> undefined

In which of the following table x and y vary inversely: 

x 5 20 10 4
y 20 5 10 25
[11] Direct and Inverse Proportions
Chapter: [11] Direct and Inverse Proportions
Concept: undefined >> undefined

In which of the following table x and y vary inversely: 

x 4 3 6 1
y 9 12 8 36
[11] Direct and Inverse Proportions
Chapter: [11] Direct and Inverse Proportions
Concept: undefined >> undefined

In which of the following table x and y vary inversely: 

x 9 24 15 3
y 8 3 4 25
[11] Direct and Inverse Proportions
Chapter: [11] Direct and Inverse Proportions
Concept: undefined >> undefined

It x and y vary inversely, fill in the following blank:

x 12 16 ... 8 ...
y ... 6 4 ... 0.25

 

[11] Direct and Inverse Proportions
Chapter: [11] Direct and Inverse Proportions
Concept: undefined >> undefined

It x and y vary inversely, fill in the following blank:

x 16 32 8 128
y 4 ... ... 0.25
[11] Direct and Inverse Proportions
Chapter: [11] Direct and Inverse Proportions
Concept: undefined >> undefined

It x and y vary inversely, fill in the following blank:

x 9 ... 81 243
y 27 9 ... 1
[11] Direct and Inverse Proportions
Chapter: [11] Direct and Inverse Proportions
Concept: undefined >> undefined

Which of the following quantities vary inversely as other?

The number of x men hired to construct a wall and the time y taken to finish the job.

[11] Direct and Inverse Proportions
Chapter: [11] Direct and Inverse Proportions
Concept: undefined >> undefined

Which of the following quantities vary inversely as other?

The length x of a journey by bus and price y of the ticket.

[11] Direct and Inverse Proportions
Chapter: [11] Direct and Inverse Proportions
Concept: undefined >> undefined

Which of the following quantities vary inversely as other?

 Journey (x km) undertaken by a car and the petrol (y litres) consumed by it.

[11] Direct and Inverse Proportions
Chapter: [11] Direct and Inverse Proportions
Concept: undefined >> undefined

It is known that for a given mass of gas, the volume v varies inversely as the pressure p. Fill in the missing entries in the following table:

v (in cm3) ... 48 60 ... 100 ... 200
p (in atmospheres) 2 ... 3/2 1 ... 1/2 ...
[11] Direct and Inverse Proportions
Chapter: [11] Direct and Inverse Proportions
Concept: undefined >> undefined

If 36 men can do a piece of work in 25 days, in how many days will 15 men do it?

 
[11] Direct and Inverse Proportions
Chapter: [11] Direct and Inverse Proportions
Concept: undefined >> undefined

A work force of 50 men with a contractor can finish a piece of work in 5 months. In how many months the same work can be completed by 125 men? 

[11] Direct and Inverse Proportions
Chapter: [11] Direct and Inverse Proportions
Concept: undefined >> undefined

A work-force of 420 men with a contractor can finish a certain piece of work in 9 months. How many extra men must he employ to complete the job in 7 months?

[11] Direct and Inverse Proportions
Chapter: [11] Direct and Inverse Proportions
Concept: undefined >> undefined

1200 men can finish a stock of food in 35 days. How many more men should join them so that the same stock may last for 25 days?

[11] Direct and Inverse Proportions
Chapter: [11] Direct and Inverse Proportions
Concept: undefined >> undefined

In a hostel of 50 girls, there are food provisions for 40 days. If 30 more girls join the hostel, how long will these provisions last?

[11] Direct and Inverse Proportions
Chapter: [11] Direct and Inverse Proportions
Concept: undefined >> undefined

A car can finish a certain journey in 10 hours at the speed of 48 km/hr. By how much should its speed be increased so that it may take only 8 hours to cover the same distance?

[11] Direct and Inverse Proportions
Chapter: [11] Direct and Inverse Proportions
Concept: undefined >> undefined

1200 soldiers in a fort had enough food for 28 days. After 4 days, some soldiers were transferred to another fort and thus the food lasted now for 32 more days. How many soldiers left the fort?

[11] Direct and Inverse Proportions
Chapter: [11] Direct and Inverse Proportions
Concept: undefined >> undefined
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