Questions by uday

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A wooden box (including the lid) has external dimensions 40 cm by 34 cm by 30 cm. If the wood is 1 cm thick, how many `cm^3` of wood is used in

asked Jan 17, 2022 in 8th-maths

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From a pipe of inner radius 0.75 cm, water flows at the rate of 7 m per second. Find the volume in litres of water delivered by the pipe in 1

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)`. `y^4 –

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 following expressions are the areas of rectangles. Find the possible lengths and breadths of these rectangles. `76x^3yz^3 -:

asked Jan 17, 2022 in 8th-maths

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Factorise `p^4 + q^4 +

asked Jan 17, 2022 in 8th-maths

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Find the value of (i) `(6.25 6.25 –1.75 1.75)/4.5` (ii) `(198 198 –102

asked Jan 17, 2022 in 8th-maths

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Find x so that `(–5)^(x+1) xx (–5)^5 =

asked Jan 17, 2022 in 8th-maths

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The value of `1/4^-2`

asked Jan 17, 2022 in 8th-maths

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The multiplicative inverse of `10^10` is

asked Jan 17, 2022 in 8th-maths

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The standard form for 32,50,00,00,000 is

asked Jan 17, 2022 in 8th-maths

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The multiplicative inverse of `(– 4)^(–2) is

asked Jan 17, 2022 in 8th-maths

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`(–4)^(–4) xx (4)^(–1) =

asked Jan 17, 2022 in 8th-maths

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Astronomy The table shows the mass of the planets, the sun and the moon in our solar system. (a) Write the mass of each planet and the Moon in scientific

asked Jan 17, 2022 in 8th-maths

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If possible, find a hook-up of prime base number machine that will do the same work as the given stretching machine. Do not use `(xx 1)` machines.

asked Jan 17, 2022 in 8th-maths

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If a = – 1, b = 2, then find the value of the following: (1) `a^b + b^a` (2) `a^b – b^a` (3) `a^b xx b^2` (4) `a^b ¸

asked Jan 17, 2022 in 8th-maths

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Express each of the following in exponential form: (1) `(-1296)/14641` (2) `(-125/343)` (3) `400/3969` (4)

asked Jan 17, 2022 in 8th-maths

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If the cost price of 10 shirts is equal to the selling price of 8 shirts, then which of the following is true for the

asked Jan 17, 2022 in 8th-maths

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Avinash bought an electric iron for Rs 900 and sold it at a gain of 10%. He sold another electric iron at 5% loss which was bought Rs 1200. On the transaction he has

asked Jan 17, 2022 in 8th-maths

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40% of [100 – 20% of 300] is equal

asked Jan 17, 2022 in 8th-maths

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