Questions by yogita

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Using `(x + a) (x + b) = x^2 + (a + b) x + ab`, find `103 xx 104`

asked Jan 18, 2022 in 8th-maths

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Can a polyhedron have for its faces 4

asked Jan 18, 2022 in 8th-maths

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Which are prisms among the

asked Jan 18, 2022 in 8th-maths

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A square and a rectangular field with measurements as given in the figure have the same perimeter. Which field has a larger

asked Jan 18, 2022 in 8th-maths

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A road roller takes 750 complete revolutions to move once over to level a road. Find the area of the road if the diameter of a road roller is 84 cm and length is 1

asked Jan 18, 2022 in 8th-maths

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A rectangular paper of width 14 cm is rolled along its width and a cylinder of radius 20 cm is formed. Find the volume of the cylinder (Fig 11.45)? (Take `22/7` for

asked Jan 18, 2022 in 8th-maths

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Given a cylindrical tank, in which situation will you find surface area and in which situation volume. To find how much it can

asked Jan 18, 2022 in 8th-maths

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Simplify `(– 4)^5 xx (– 4)^(–10)`

asked Jan 18, 2022 in 8th-maths

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Simplify and write the answer in the exponential form.

asked Jan 18, 2022 in 8th-maths

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Simplify. `(25xxt^(-4))/(5^(-3)xx10xxt^(-8))

asked Jan 18, 2022 in 8th-maths

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Express the following numbers in standard form.

asked Jan 18, 2022 in 8th-maths

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A machine in a soft drink factory fills 840 bottles in six hours. How many bottles will it fill in five

asked Jan 18, 2022 in 8th-maths

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Two persons could fit new windows in a house in 3 days. One of the persons fell ill before the work started. How long would the job take

asked Jan 18, 2022 in 8th-maths

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Factorise the following using the identity `a^2 – b^2 = (a + b) (a – b)`. `x^2 –

asked Jan 17, 2022 in 8th-maths

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Factorise the following using the identity `a^2 – b^2 = (a + b) (a – b)`. `9x^2 – (3y +

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. `x^2 – 3x +

asked Jan 17, 2022 in 8th-maths

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Factorise the expressions and divide them as directed: `(3x^4 – 1875) -: (3x^2 –

asked Jan 17, 2022 in 8th-maths

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Verify the following: `(ab + bc) (ab – bc) + (bc + ca) (bc – ca) + (ca + ab) (ca – ab) =

asked Jan 17, 2022 in 8th-maths

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Subtract `b (b^2 + b – 7) + 5` from `3b^2 – 8` and find the value of expression obtained for `b = –

asked Jan 17, 2022 in 8th-maths

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Find the length of the side of the given square if area of the square is 625 square units and then find the value of x.

asked Jan 17, 2022 in 8th-maths

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