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

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Find whether the first polynomial is a factor of the second.

y − 2, 3y3 + 5y2 + 5y + 2

[12] Factorization
Chapter: [12] Factorization
Concept: undefined >> undefined

Find whether the first polynomial is a factor of the second.

 4x2 − 5, 4x4 + 7x2 + 15

[12] Factorization
Chapter: [12] Factorization
Concept: undefined >> undefined

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Find the volume of a cube whose surface area is  96 cm2.

[9] Mensuration
Chapter: [9] Mensuration
Concept: undefined >> undefined

Find whether the first polynomial is a factor of the second.

 4 − z, 3z2 − 13z + 4

[12] Factorization
Chapter: [12] Factorization
Concept: undefined >> undefined

Find whether the first polynomial is a factor of the second.

2a − 3, 10a2 − 9a − 5

[12] Factorization
Chapter: [12] Factorization
Concept: undefined >> undefined

Find the volume of a cube whose surface area is 150 m2 .

[9] Mensuration
Chapter: [9] Mensuration
Concept: undefined >> undefined

Find whether the first polynomial is a factor of the second.

4y + 1, 8y2 − 2y + 1

[12] Factorization
Chapter: [12] Factorization
Concept: undefined >> undefined

Divide:
x2 − 5x + 6 by x − 3

[12] Factorization
Chapter: [12] Factorization
Concept: undefined >> undefined

Divide:
ax2 − ay2 by ax + ay

[12] Factorization
Chapter: [12] Factorization
Concept: undefined >> undefined

Divide:
x4 − y4 by x2 − y2

[12] Factorization
Chapter: [12] Factorization
Concept: undefined >> undefined

Divide:
acx2 + (bc + ad)x + bd by (ax + b)

[12] Factorization
Chapter: [12] Factorization
Concept: undefined >> undefined

Divide:

(a2 + 2ab + b2) − (a2 + 2ac + c2) by 2a + b + c

[12] Factorization
Chapter: [12] Factorization
Concept: undefined >> undefined

Find the surface area of a wooden box whose shape is of a cube, and if the edge of the box is 12 cm.

[9] Mensuration
Chapter: [9] Mensuration
Concept: undefined >> undefined

Divide:

\[\frac{1}{4} x^2 - \frac{1}{2}x - 12 by \frac{1}{2}x - 4\]
[12] Factorization
Chapter: [12] Factorization
Concept: undefined >> undefined

Cubes A, B, C having edges 18 cm, 24 cm and 30 cm respectively are melted and moulded into a new cube D. Find the edge of the bigger cube D.

[9] Mensuration
Chapter: [9] Mensuration
Concept: undefined >> undefined

Three equal cubes are placed adjacently in a row. Find the ratio of total surface area of the new cuboid to that of the sum of the surface areas of the three cubes.

[9] Mensuration
Chapter: [9] Mensuration
Concept: undefined >> undefined

Two cubes, each of volume 512 cm3 are joined end to end. Find the surface area of the resulting cuboid.

[9] Mensuration
Chapter: [9] Mensuration
Concept: undefined >> undefined

Three cubes whose edges measure 3 cm, 4 cm, and 5 cm respectively are melted to form a new cube. Find the surface area of the new cube formed.

[9] Mensuration
Chapter: [9] Mensuration
Concept: undefined >> undefined

A metal cube of edge 12 cm is melted and formed into three smaller cubes. If the edges of the two smaller cubes are 6 cm and 8 cm, find the edge of the third smaller cube.

[9] Mensuration
Chapter: [9] Mensuration
Concept: undefined >> undefined

Find the cost of sinking a tubewell 280 m deep, having diameter 3 m at the rate of Rs 3.60 per cubic metre. Find also the cost of cementing its inner curved surface at Rs 2.50 per square metre.

[9] Mensuration
Chapter: [9] Mensuration
Concept: undefined >> undefined
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