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Area of a quadrilateral ABCD is 20 `cm^2` and perpendiculars on BD from opposite vertices are 1 cm and 1.5 cm. The length of BD

asked Jan 17, 2022 in 8th-maths by nikhil (1.8k points)

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The areas of any two faces of a cuboid are

asked Jan 17, 2022 in 8th-maths by nikhil (1.8k points)

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Two cuboids with equal volumes will always have equal surface

asked Jan 17, 2022 in 8th-maths by uday (1.6k points)

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A cuboidal tin box opened at the top has dimensions `20 cm xx 16 cm xx 14 cm`. What is the total area of metal sheet required to make 10 such

asked Jan 17, 2022 in 8th-maths by sumit (1.6k points)

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Factorise the following using the identity `a^2 – b^2 = (a + b) (a – b)`. `p^5 –

asked Jan 17, 2022 in 8th-maths by yogita (1.8k points)

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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 by Arun (1.7k points)

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Perform the following divisions: `(x^3y^3 + x^2y^3 – xy^4 + xy) -:

asked Jan 17, 2022 in 8th-maths by vaibhav (1.7k points)

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`[(2/13)^(-1) -: (2/13)^3]^3 xx (2/13)^(-13)` =

asked Jan 17, 2022 in 8th-maths by nishit (1.8k points)

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The usual form of `3.41 xx 10^6` is

asked Jan 17, 2022 in 8th-maths by nikhil (1.8k points)

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Solve the following:(i) `100^(–10)` (ii) `2^(–2) xx 2^(–3)` (iii) `(1/2)^(-2) -:

asked Jan 17, 2022 in 8th-maths by krutika (1.7k points)

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Find the value of x so that `(5/3)^(-3) xx (5/3)^(-14) =

asked Jan 17, 2022 in 8th-maths by sumit (1.6k points)

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Express `(1.5 xx 10^6)/(2.5 xx 10^(-6))` in the standard

asked Jan 17, 2022 in 8th-maths by Simran (1.8k points)

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A sugar factory has annual sales of 3 billion 720 million kilograms of sugar. Express this number in the standard

asked Jan 17, 2022 in 8th-maths by sumit (1.6k points)

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Express each of the following in standard form: -1. (a) The mass of a proton in gram is `1673/1000000000000000000000000000` (b) A Helium atom has a diameter of 0.000000022

asked Jan 17, 2022 in 8th-maths by Simran (1.8k points)

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`(125 xx x^(-3))/(5^(-3) xx 25 xx

asked Jan 17, 2022 in 8th-maths by nishit (1.8k points)

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Find a single repeater machine that will do the same work as each hook-up. (a) (b) (c) (d) (e) (f)

asked Jan 17, 2022 in 8th-maths by vaibhav (1.7k points)

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If the price of petrol, diesel and LPG is slashed as follows: Fuel Old prices/litre (in Rs) New price/litre (in Rs) % Decrease Petrol / LDiesel / LLPG/14.2kg 45.6232.86304.70 40.6230.86279.70 ______________________________ Complete the above

asked Jan 17, 2022 in 8th-maths by nishit (1.8k points)

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The food labels given below give information about 2 types of soup: cream of tomato and sweet corn. Use these labels to answer the given questions. (All the servings are based on a 2000 calorie diet.) (a) Which can be measured more accurately : the total amount of fat in cream of tomato soup or the total amount of fat in sweet corn soup? Explain. (b) One serving of cream of tomato soup contains 29% of the recommended daily value of sodium for a 2000 calorie diet. What is the recommended daily value of sodium in milligrams? Express

asked Jan 17, 2022 in 8th-maths by yogita (1.8k points)

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Rain forests are home to 90,000 of the 2,50,000 identified plant species in the world. What per cent of the world’s identified plant species are found in rain

asked Jan 17, 2022 in 8th-maths by nishit (1.8k points)

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If 25 metres of cloth costs Rs 337.50, then (i) What will be the cost of 40 metres of the same type of cloth? (ii) What will be the length of the cloth bought for Rs

asked Jan 17, 2022 in 8th-maths by Arun (1.7k points)

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