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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 walls and ceiling of a room are to be plastered. The length, breadth and height of the room are 4.5 m, 3 m, and 350 cm respectively. Find the cost of plastering at the rate of Rs 8 per

asked Jan 17, 2022 in 8th-maths by purvi (1.8k 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 Arun (1.7k points)

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

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

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Factorise the expressions and divide them as directed: `(x^4 – 16) -: x^3 + 2x^2 + 4x +

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

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`(–10) xx (–10) xx (–10) xx (–10) =

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

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If y be any non-zero integer, then `y^0` is equal

asked Jan 17, 2022 in 8th-maths by uday (1.6k 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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`3^5 -: 3^–6` can be simplified as

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

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The expression for `3^5` with a negative exponent is

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

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The standard form for 203000 is `2.03 xx

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

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Express `16/18` and `(-16)/18` as powers of a rational

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

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Find the value of x so that `(2^(–1) + 4^(–1) + 6^(–1) + 8^(–1))x =

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

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If `(5^m xx 5^3 xx 5^(-2))/5^-5 = 5^12`, find

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

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About 230 billion litres of water flows through a river each day. How many litres of water flows through that river in a week? How many litres of water flows through the river in an year? Write your answer in standard

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

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Repeater Machine Similarly, repeater machine is a hypothetical machine which automatically enlarges items several times. For example, sending a piece of wire through a `(xx 2^4)` machine is the same as putting it through a (xx 2) machine four times. So, if you send a 3 cm piece of wire through a `(xx 2^4)` machine, its length becomes `3 xx 2 xx 2 xx 2 xx 2 = 48` cm. It can also be written that a base (2) machine is being applied 4 times. What will be the new length of a 4 cm strip inserted in

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

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A particular star is at a distance of about `8.1 xx 10^13` km from the Earth. Assuring that light travels at `3 xx 10^8` m per second, find how long does light takes from that star to reach the

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

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Radhika bought a car for Rs 2,50,000. Next year its price decreased by 10% and further next year it decreased by 12%. In the two years overall decrease per cent in the price of the car

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

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The value of a car, bought for Rs 4,40,000 depreciates each year by 10% of its value at the beginning of that year. So its value becomes Rs 3,08,000 after three

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

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In 2007 – 08, the number of students appeared for Class X examination was 1,05,332 and in 2008–09, the number was 1,16,054. If 88,151 students pass the examination in 2007–08 and 103804 students in 2008–09. What is the increase or decrease in pass % in Class X

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

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