CBSE > Class 08 > Mathematics | CBSE Board | Homework Help

P = rs. 8500 R = 8% N = 2 years As C.I. = A - P So, A = P ( 1+ R/100 ) to the power 2 A = 8500 ( 1 + 8/100 ) to the power 2 = 8500 × 2/25 × 2/25 = 54•4 So, C.I. = 54•4 - 8500 = 8445•6

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A sum of rs25,000 invested at 8% p.a. compunded semi-annually amounts to rs 28,121.60. Complete the time period

Posted by Devesh Kumar 6 years, 11 months ago

CBSE > Class 08 > Mathematics

1 answers

Devesh Kumar 6 years, 11 months ago

1 1\2

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What is direct or inverse properties

Posted by Lokesh Kumar 6 years, 11 months ago

CBSE > Class 08 > Mathematics

2 answers

Virender Singh 6 years, 11 months ago

An inverse in one causes a corresponding decreases in the other or vice versa. An inverse variation or porporation is indicated when two quantites are so related that The ratio of any two values of the one quantity is the inverse of the ratio of the corresponding values of the other

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Yogita Ingle 6 years, 11 months ago

a) Two quantities x and y are said to be in direct proportion
if they increase (decrease) together in such a manner that the ratio of their corresponding values remains constant.
That is if x/y=k= [k is a positive number] = Constant
b) Two quantities x and y are said to be in inverse proportion
if an increase in x causes a proportional decrease in y (and vice-versa) in such a manner that the product of their corresponding values remains constant.
That is, if xy = k= Constant

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What is the polynomial

Posted by Shivam Raj 6 years, 11 months ago

CBSE > Class 08 > Mathematics

1 answers

Yogita Ingle 6 years, 11 months ago

A polynomial is a monomial or the sum or difference of monomials. Each monomial is called a term of the poynomial .
A polynomial with one term is called a monomial
A polynomial with two terms is called a binomial
A polynomial with three terms is called a trinomial

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Find the value of t which (-8)t-2×(-8)-12=(-8)-6

Posted by Vikas Verma 6 years, 11 months ago

CBSE > Class 08 > Mathematics

1 answers

Akilan N 6 years, 11 months ago

-5.5

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X+x+2x=

Posted by Anita Paikaray 6 years, 11 months ago

CBSE > Class 08 > Mathematics

6 answers

Kushagra Gupta 6 years, 11 months ago

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V Laksh 6 years, 11 months ago

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Piyush Kumar 6 years, 11 months ago

2x3

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Aafiya Zohra 6 years, 11 months ago

=4x

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Akshita Wadhwa 6 years, 11 months ago

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Tanuja Ingle 6 years, 11 months ago

X+x+2x=4x

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The central hall of a school is 100m long and 15m high . It has 10 doors each of size 4m×2m and 10 window each of size 1.5m× 2m . If the cost of white washing the walls of the hall at the rate of rupee 1.40 per m×m is rupees 6986, Find the breadth of the hall.

Posted by Shiva Ji Verma 6 years, 11 months ago

CBSE > Class 08 > Mathematics

0 answers

ANSWER

Identify the term, their coefficients for 5xyz^2- 3zy

Posted by Rick Sarkar 6 years, 11 months ago

CBSE > Class 08 > Mathematics

0 answers

ANSWER

How many base does a triangular pyramid have??????

Posted by Lanson Dsouza 6 years, 11 months ago

CBSE > Class 08 > Mathematics

3 answers

Jal Patel 6 years, 11 months ago

4 or FOUR

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V Laksh 6 years, 11 months ago

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Lanson Dsouza 6 years, 11 months ago

I don't know

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The lateral surface area of a hollow cylinder is 4224 cm sq2 . It is cut along its height and formed a rectangular sheet of width 33cm . Find the perimeter of rectangular sheet.

Posted by Madhura C Pandurang 6 years, 11 months ago

CBSE > Class 08 > Mathematics

1 answers

Yogita Ingle 6 years, 11 months ago

∵   Lateral surface area of a cylinder = 4224 cm2
and       let length of the rectangular sheet = l cm
∴      33 x l = 4224
l = 4224/33 = 128 cm
Now perimeter of the rectangular sheet = 2[Length + Breadth]
= 2[128 cm + 33 cm]
= 2 x 161 cm
= 322 cm

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Mahesh allow a discount of 12%on a cooler and still gain 10% . If he bought it for Rs3800, find the list price of the cooler?

Posted by S Singh 5 years, 8 months ago

CBSE > Class 08 > Mathematics

0 answers

ANSWER

A number decrased by 27/1/2 gives 87, the number is

Posted by Aruna Mishra 6 years, 11 months ago

CBSE > Class 08 > Mathematics

2 answers

Kashish Bhambhani 6 years, 11 months ago

73.5

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Akilan N 6 years, 11 months ago

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Varun sold a car at 2,00,000 and he got a profit of 10% f8nd the cost price of car

Posted by Eshwer Panwer 6 years, 11 months ago

CBSE > Class 08 > Mathematics

1 answers

Jaideep Karwasra 6 years, 11 months ago

1,80,000

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Find the difference between the compound interest on Rs. 6000 for 1 and half years at 4%p.a when compounded half yearly and when compounded quarterly.

Posted by Abhishek Negi 6 years, 11 months ago

CBSE > Class 08 > Mathematics

0 answers

ANSWER

A figure is in the form of quadrilateral ABCD. Area is 165 cm² . Find the length of perpendicular drawn from D on AC if AC =15cm and length of perpendicular from B on AC is 12cm.

Posted by Priti Sharma 6 years, 11 months ago

CBSE > Class 08 > Mathematics

1 answers

Rick Sarkar 6 years, 11 months ago

Ans:- length of perpendicular from D to AC is '10 cm ' Soln:- AREA OF ∆ABC= 1/2× BASE ×HEIGHT = 1/2× 15× 12 = 180/2 =90cm sq. Remaining area = 165cm - 90cm = 75cm Therefore, the other remaining are of Quadrilateral ∆ACD Let's the height of the the triangle be n The area of other triangle = 1/2× base× height Or 75 =1/2× 15 × n Or 75/n= 1/2×15 Or n = 75× 2/15 Or n = 10

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(a³+b³)

Posted by Anish Rokkam 6 years, 11 months ago

CBSE > Class 08 > Mathematics

2 answers

Jaideep Karwasra 6 years, 11 months ago

(a+b)(a-b)(a+b)

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Tushar Bharti 6 years, 11 months ago

(a+b)(a+b)(a+b) a^2+ab+ba+b^2(a+b) a^2+2ab+b^2(a+b) a^3+a^2b+2a^2b+2ab^2+ab^2+b^3 a^3+3a^2b+3ab^2+b^3

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A man got a 10% increase in his salary. If salary ₹1,54,000 find his original salary

Posted by Anupam Singh 6 years, 11 months ago

CBSE > Class 08 > Mathematics

3 answers

Akshita Wadhwa 6 years, 11 months ago

Original salary beta x ho gyi and Now = new salary + increase maar de hi jaaega nhi hua toe mere ghar aa jayio ok

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Tushar Bharti 6 years, 11 months ago

Men increases salary= 10% Man salary= rupees 154000 10% of rupees 154000 = 10/100*1,54,000 =10*1540 =15,400 So increases salary is 15400 According to question Now man salary is 15400 + 154000 =169400

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Tushar Bharti 6 years, 11 months ago

increases salary= 10%

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An alloy contain 32% coper,40% nickel and rest zinc. Find the mass of the zinc in 1kg of the alloy.

Posted by Chitra Pal 6 years, 11 months ago

CBSE > Class 08 > Mathematics

0 answers

ANSWER

Riya scored 62% in English,80%in mathematics and 56%in social science. If the maximum marks in these subject were 50,100 and 75 respectively, find has aggregate percentage

Posted by Chitra Pal 6 years, 11 months ago

CBSE > Class 08 > Mathematics

0 answers

ANSWER

999846÷0.99=(?)

Posted by Khushi Choudhari 6 years, 11 months ago

CBSE > Class 08 > Mathematics

1 answers

Gajavelli Swathi 6 years, 11 months ago

1009945.45

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Ouadrilateral plan angle a= 6.5 cm angle p =9o degree angle a = 110 degree how do we get angle

Posted by Shree Yazhini Yazhini 6 years, 11 months ago

CBSE > Class 08 > Mathematics

0 answers

ANSWER

Solve the following equation p+7 ÷p-6=1÷3

Posted by Suyash Jain 6 years, 11 months ago

CBSE > Class 08 > Mathematics

1 answers

Yogita Ingle 6 years, 11 months ago

{tex}\begin{array}{l}\;\frac{p\;+\;7}{p-\;6}=\;\frac13\\\end{array}{/tex}
3(p +7) = 1 (p -6)

3p + 21 = p - 6

3p - p = -6 - 21
2p = - 27
p = -27/2

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The surface area of a cylinder of base radius r and height h is

Posted by Khushpreet Bhullar 6 years, 11 months ago

CBSE > Class 08 > Mathematics

2 answers

Khushi Bothra 6 years, 11 months ago

2πr(h+r) sq.units

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Khushpreet Bhullar 6 years, 11 months ago

Surface area of cylinder with radius r and height h?

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(7x+5)(7x+5)

Posted by Chhavi Kaim 6 years, 11 months ago

CBSE > Class 08 > Mathematics

2 answers

Tanuja Ingle 6 years, 11 months ago

(A+B)^2= a^2+2ab+b^3. (7x+5)^2= 7x^2+2×7x×5+5^2 49x^2+70x+25

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Yogita Ingle 6 years, 11 months ago

(7x + 5) (7x + 5)
= 7x (7x + 5) + 5(7x + 5)
= 49x² + 35x + 35x + 25
= 49x² + 70x + 25

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What is the formula to find marked price if discount and sale price is given

Posted by Sneha Tanwar 5 years, 8 months ago

CBSE > Class 08 > Mathematics

1 answers

Yogita Ingle 6 years, 11 months ago

Discount is defined as the amount of rebate given on the label price (marked price) of an article. It is given by merchants/shopkeepers for attracting customers for increasing their sales.
Discount = Marked Price – Selling Price
Marked Price =Discount + Selling Price

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7p÷7_7=77

Posted by Sachin Tomar 6 years, 11 months ago

CBSE > Class 08 > Mathematics