Questions by uday

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The following table shows the distance travelled by one of the new eco-friendly energy-efficient cars travelled on gas. Litres of gas 1 0.5 2 2.5 3 5 Distance (km) 15 7.5 30 37.5 45 75 Which type of properties are indicated by the table? How much distance will be covered by the car in 8 litres of

asked Jan 17, 2022 in 8th-maths

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What will be the change in the volume of a cube when its side becomes 10 times the original

asked Jan 17, 2022 in 8th-maths

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If the radius of a cylinder is tripled but its curved surface area is unchanged, then its height will

asked Jan 17, 2022 in 8th-maths

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How many small cubes with edge of 20 cm each can be just accommodated in a cubical box of 2 m

asked Jan 17, 2022 in 8th-maths

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If a cube fits exactly in a cylinder with height h, then the volume of the cube is __________ and surface area of the cube is

asked Jan 17, 2022 in 8th-maths

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All six faces of a cuboid are __________ in shape and of ______

asked Jan 17, 2022 in 8th-maths

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Total surface area of a cylinder of radius h and height r is

asked Jan 17, 2022 in 8th-maths

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Area of a rhombus = `1/2` product of

asked Jan 17, 2022 in 8th-maths

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Four horses are tethered with equal ropes at 4 corners of a square field of side 70 metres so that they just can reach one another. Find the area left ungrazed by the

asked Jan 17, 2022 in 8th-maths

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Find the area of the shaded portion in the following

asked Jan 17, 2022 in 8th-maths

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Radius of a cylinder is r and the height is h. Find the change in the volume if the (a) height is doubled. (b) height is doubled and the radius is halved. (c) height remains same and the radius is

asked Jan 17, 2022 in 8th-maths

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A truck carrying 7.8 `m^3` concrete arrives at a job site. A platform of width 5 m and height 2 m is being contructed at the site. Find the length of the platform, constructed from the amount of concrete on the

asked Jan 17, 2022 in 8th-maths

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The following expressions are the areas of rectangles. Find the possible lengths and breadths of these rectangles. `51x^3y^2z -:

asked Jan 17, 2022 in 8th-maths

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The base of a parallelogram is (2x + 3 units) and the corresponding height is (2x – 3 units). Find the area of the parallelogram in terms of x. What will be the area of parallelogram of x = 30

asked Jan 17, 2022 in 8th-maths

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If m – n = 16 and `m^2 + n^2 = 400`, then find

asked Jan 17, 2022 in 8th-maths

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The figure shows the dimensions of a wall having a window and a door of a room. Write an algebraic expression for the area of the wall to be painted.

asked Jan 17, 2022 in 8th-maths

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Match the expressions of column I with that of column II: Column I Column II (1) `(21x + 13y)^2` (a) `441x^2 – 169y^2` (2) `(21x – 13y)^2` (b) `441x^2 + 169y^2 + 546xy` (3) `(21x – 13y) (21x + 13y)` (c) `441x^2 + 169y^2 – 546xy` (d) `441x^2 – 169y^2 + 546xy`

asked Jan 17, 2022 in 8th-maths

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Multiplicative inverse of `2^7`

asked Jan 17, 2022 in 8th-maths

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`(-4)^4 xx(5/4)^4`

asked Jan 17, 2022 in 8th-maths

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`(2^-3)^2 xx (3^-2)^3`

asked Jan 17, 2022 in 8th-maths

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