Questions by yogita

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The floor of a building consists of 3000 tiles which are rhombus shaped and each of its diagonals are 45 cm and 30 cm in length. Find the total cost of polishing the floor,if the cost per `m^2` is Rs

asked Jan 17, 2022 in 8th-maths

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Rukhsar painted the outside of the cabinet of measure `1 m xx 2 m xx 1.5 m`. How much surface area did she cover if she painted all except the bottom of the

asked Jan 17, 2022 in 8th-maths

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A rectangular piece of paper 11 cm × 4 cm is folded without overlapping to make a cylinder of height 4 cm. Find the volume of the

asked Jan 17, 2022 in 8th-maths

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Simplify `(– 4)^5 xx (– 4)^(–10)`

asked Jan 17, 2022 in 8th-maths

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Find the value of

asked Jan 17, 2022 in 8th-maths

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Simplify and express the result in power notation with positive exponent.

asked Jan 17, 2022 in 8th-maths

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Express the following numbers in usual form. `3 xx 10^(–

asked Jan 17, 2022 in 8th-maths

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Express the number appearing in the following statements in standard form. Size of a bacteria is 0.0000005

asked Jan 17, 2022 in 8th-maths

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Suppose 2 kg of sugar contains `9 xx 10^6` crystals. How many sugar crystals are there in 5 kg of sugar?

asked Jan 17, 2022 in 8th-maths

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6 pipes are required to fill a tank in 1 hour 20 minutes. How long will it take if only 5 pipes of the same type are

asked Jan 17, 2022 in 8th-maths

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If a box of sweets is divided among 24 children, they will get 5 sweets each. How many would each get, if the number of the children is reduced by

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 – 6x +

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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Factorise the expressions and divide them as directed: `(9x^2 – 4) -: (3x +

asked Jan 17, 2022 in 8th-maths

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Factorise the expressions and divide them as directed: `(3x^2 – 48) -: (x –

asked Jan 17, 2022 in 8th-maths

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Verify the following: `(a^2 – b^2) (a^2 + b^2) + (b^2 – c^2) (b^2 + c^2) + (c^2 – a^2) + (c^2 + a^2) =

asked Jan 17, 2022 in 8th-maths

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Verify the following:

asked Jan 17, 2022 in 8th-maths

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Find the value of a, if `9a = 76^2 –

asked Jan 17, 2022 in 8th-maths

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Find the value of a, if `pqa = (3p + q)^2 – (3p –

asked Jan 17, 2022 in 8th-maths

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What should be added to `4c (– a + b + c)` to obtain `3a (a + b + c) – 2b(a – b +

asked Jan 17, 2022 in 8th-maths

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