When some metal cubes, with edges of 2 cm each, were dropped into the tank, the water level increased by 4 cm. Find the number of cubes in the tank


0

475

January 31, 2021

Maths class 9 cbse


1

2125

December 24, 2020

Are the bonds in each of the following substances ionic, nonpolar covalent, or polar covalent? Arrange the substances with polar covalent bonds in order of increasing bond polarity:


0

2929

May 29, 2020

Factorise: 250(ab)^3+2


1

379

June 19, 2019

Prove (a+b+c)^3  a^3  b^3  c^3 = 3(a+b) (b+c) (c+a)


1

171

June 19, 2019

If a+b+c = 0, then prove that (b+c)^2 / 3bc + (c+a)^2 / 3ca + (a+b)^2 / 3ab = 1


1

895

June 18, 2019

If a+b = 12 and ab= 27, find the value of a^3+b^3


1

337

June 18, 2019

If A,B,C are all non zero and A+B+C = 0 Prove that A2/BC + B2/CA + C2/AB = 3


1

419

June 18, 2019

Prove that (a+b+c)3 –a^3b^3c63= 3(a+b)(b+c)(c+a)


1

293

June 18, 2019

Factorise: x^3 + 13x^2 + 32x + 20


1

151

June 18, 2019

Represent root 5 on number line


1

596

June 18, 2019

If a+b+c=5,and ab+bc+ca=10,prove a^3+b^3+c^33abc=25


1

584

June 17, 2019

Prove that (a+b+c)whole cube  a cube b cube  c cube = 3(a+b)(b+c)(c+a )


1

5589

June 17, 2019

The blood groups of 30 students of class VIII are recorded


1

286

April 12, 2019

Eleven bags of wheat flour, each marked 5 kg, actually contained the following weights of flour


1

414

April 12, 2019

Activity : Ask all the students in your class to write a 3digit number


1

703

April 10, 2019

Activity: Note the frequency of twowheelers, threewheelers and fourwheelers going past


1

554

April 10, 2019

The distance (in km) of 40 engineers from their residence to their place of work were found


1

153

April 10, 2019

To know the opinion of the students about the subject statistics, a survey of 200 students


1

283

April 10, 2019

A teacher wanted to analyse the performance of two sections of students in a mathematics test


1

564

April 10, 2019

An organisation selected 2400 families at random and surveyed them to determine


1

505

April 10, 2019

Three coins are tossed simultaneously 200 times with the following frequencies


1

494

April 10, 2019

In a particular section of class IX, 40 students were asked about the month of their birth


1

334

April 10, 2019

1500 families with 2 children were selected randomly, and the following data were recorded


1

703

April 10, 2019

In a cricket match, a batswoman hits a boundary 6 times out of 30 balls she plays


1

324

April 10, 2019

Give one example of a situation in which (i) the mean is an appropriate measure of central tendency


1

333

April 10, 2019

Find the mean salary of 60 workers of a factory from the following table


1

509

April 10, 2019

Find the mode of 14, 25,14, 28,18,17,18,14, 23, 22,14 and 18


1

502

April 10, 2019

The following observations have been arranged in ascending order


1

311

April 10, 2019

In a mathematics test given to 15 students, the following marks (out of 100) are recorded


1

515

April 10, 2019
