Questions by purvi

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Multiply (x – y) and (3x +

asked Jan 18, 2022 in 8th-maths

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Multiply `(a^2 + 2b^2)` and (5a –

asked Jan 18, 2022 in 8th-maths

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Find the product. `(p^2 – q^2) (2p +

asked Jan 18, 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. (4x + 5) (4x –

asked Jan 18, 2022 in 8th-maths

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Show that. `(9p – 5q)^2 + 180pq = (9p +

asked Jan 18, 2022 in 8th-maths

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Show that. `(4pq + 3q)^2 – (4pq – 3q)^2 =

asked Jan 18, 2022 in 8th-maths

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Using `a^2 – b^2 = (a + b) (a – b)`, find `153^2 –

asked Jan 18, 2022 in 8th-maths

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Using `(x + a) (x + b) = x^2 + (a + b) x + ab`, find `5.1 xx 5.2`

asked Jan 18, 2022 in 8th-maths

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For each given solid, identify the top view, front view and side view. #fig (i) (ii)

asked Jan 18, 2022 in 8th-maths

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Can a polyhedron have for its faces a square and four

asked Jan 18, 2022 in 8th-maths

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Verify Euler’s formula for these

asked Jan 18, 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 18, 2022 in 8th-maths

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Top surface of a raised platform is in the shape of a regular octagon as shown in the figure. Find the area of the octagonal

asked Jan 18, 2022 in 8th-maths

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There is a pentagonal shaped park as shown in the figure. For finding its area Jyoti and Kavita divided it in two different ways. Find the area of this park using both ways. Can you suggest some other wayof finding its

asked Jan 18, 2022 in 8th-maths

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An aquarium is in the form of a cuboid whose external measures are `80 cm xx 30 cm xx 40 cm`. The base, side faces and back face are to be covered with a coloured paper. Find the area of the paper

asked Jan 18, 2022 in 8th-maths

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Find the height of a cylinder whose radius is 7 cm and the total surface area is 968

asked Jan 18, 2022 in 8th-maths

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There are two cuboidal boxes as shown in the adjoining figure. Which box requires the lesser amount of material to

asked Jan 18, 2022 in 8th-maths

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Find the side of a cube whose surface area is 600

asked Jan 18, 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 18, 2022 in 8th-maths

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Diameter of cylinder A is 7 cm, and the height is 14 cm. Diameter of cylinder B is 14 cm and height is 7 cm. Without doing any calculations can you suggest whose volume is greater? Verify it by finding thevolume of both the cylinders. Check whether the cylinder with greater volume also has greater surface

asked Jan 18, 2022 in 8th-maths

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