Questions by nishit

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Simplify. `(a + b) (c – d) + (a – b) (c + d) + 2 (ac +

asked Jan 17, 2022 in 8th-maths

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Simplify. `(1.5x – 4y)(1.5x + 4y + 3) – 4.5x +

asked Jan 17, 2022 in 8th-maths

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Simplify. `(a + b + c)(a + b –

asked Jan 17, 2022 in 8th-maths

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Using the Identity (I), find `(2x +

asked Jan 17, 2022 in 8th-maths

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Using the Identity (I), find

asked Jan 17, 2022 in 8th-maths

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Use a suitable identity to get each of the following products. (2a – 7) (2a –

asked Jan 17, 2022 in 8th-maths

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Use the identity `(x + a) (x + b) = x^2 + (a + b) x + ab` to find the following products. (2x + 5y) (2x + 3y)

asked Jan 17, 2022 in 8th-maths

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Show that. `(3x + 7)^2 – 84x = (3x –

asked Jan 17, 2022 in 8th-maths

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Using identities, evaluate.

asked Jan 17, 2022 in 8th-maths

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Using `(x + a) (x + b) = x^2 + (a + b) x + ab`, find `9.7 xx

asked Jan 17, 2022 in 8th-maths

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Mrs. Kaushik has a square plot with the measurement as shown in the figure. She wants to construct a house in the middle of the plot. A garden is developedaround the house. Find the total cost of developing a garden around the house at the rate of Rs 55 per

asked Jan 17, 2022 in 8th-maths

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The shape of a garden is rectangular in the middle and semi circular at the ends as shown in the diagram. Find the area and the perimeter of this garden [Length of rectangle is 20 – (3.5 + 3.5) metres].

asked Jan 17, 2022 in 8th-maths

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In a building there are 24 cylindrical pillars. The radius of each pillar is 28 cm and height is 4 m. Find the total cost of painting the curved surface area of all pillars at the rate of Rs 8 per

asked Jan 17, 2022 in 8th-maths

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The lateral surface area of a hollow cylinder is 4224 `cm^2`. It is cut along its height and formed a rectangular sheet of width 33 cm. Find the perimeter of rectangular

asked Jan 17, 2022 in 8th-maths

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Find the height of the cylinder whose volume is 1.54 m3 and diameter of the base is 140 cm

asked Jan 17, 2022 in 8th-maths

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If each edge of a cube is doubled, how many times will its surface area

asked Jan 17, 2022 in 8th-maths

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Express `4^(– 3)` as a power with the base

asked Jan 17, 2022 in 8th-maths

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asked Jan 17, 2022 in 8th-maths

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Express the following numbers in usual form. `7.54 xx 10^(– 4)`

asked Jan 17, 2022 in 8th-maths

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Express the following numbers in standard form. 6020000000000000

asked Jan 17, 2022 in 8th-maths

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