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Draw a pie chart of the data given below. The time spent by a child during a day. Sleep- 8 hours School- 6 hours Home work - 4 hours Play- 4 hours Others- 2 hours

Posted by Sudeshna Pradhan 6 years, 6 months ago

CBSE > Class 08 > Mathematics

2 answers

Sia ? 6 years, 6 months ago

Item	Hours	In Fraction	In Degree
Sleep	8	{tex}\frac{8}{24}=\frac{1}{3}{/tex}	{tex}\frac{1}{3} \times 360^{\circ}=120^{\circ}{/tex}
School	6	{tex}\frac{6}{24}=\frac{1}{4}{/tex}	{tex}\frac{1}{4} \times 360^{\circ}=90^{\circ}{/tex}
Homework	4	{tex}\frac{4}{24}=\frac{1}{6}{/tex}	{tex}\frac{1}{6} \times 360^{\circ}=60^{\circ}{/tex}
Play	4	{tex}\frac{4}{24}=\frac{1}{6}{/tex}	{tex}\frac{1}{6} \times 360^{\circ}=60^{\circ}{/tex}
Others	2	{tex}\frac{2}{24}=\frac{1}{12}{/tex}	{tex}\frac{1}{12} \times 360^{\circ}=30^{\circ}{/tex}

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Gaurav Seth 6 years, 6 months ago

First we find the central angle corresponding to the given activities.

Now, the required pie chart is given below:

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ANSWER

-x+24=3x-20

Posted by Kamya Teckchandani 6 years, 6 months ago

CBSE > Class 08 > Mathematics

3 answers

Sia ? 6 years, 6 months ago

-x + 24 = 3x - 20
20 + 24 = 3x + x
44 = 4x
{tex}x = \frac{44}{4} {/tex}= 11

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Satyam Krishna 6 years, 6 months ago

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Naman Aggarwal 6 years, 6 months ago

-x-3x=-20-24 -4x=-44 x=-44/-4 x=11

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The adjacent figure HOPE is a parallelogram. Find the angle measures x,y and z. State the properties you use to find them

Posted by Oliva Goswami 6 years, 5 months ago

CBSE > Class 08 > Mathematics

1 answers

Sia ? 6 years, 5 months ago

x = 180°– 70° = 110° [ Opposite angles are equal; Sum of angles on a straight line= 180°]
y = 40° [ Vertically opposite angles are equal]
40° + z + x = 180° [ Angle Sum Property]
⇒40° + z +110° = 180°
⇒z + 150° = 180°
⇒z = 180°– 150°
⇒z = 30°.

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5metter to 10 km find the ratio

Posted by Kirtidanc Gadhavi 6 years, 6 months ago

CBSE > Class 08 > Mathematics

2 answers

Madhavi Bagri 6 years, 6 months ago

5 : 2000 m

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Sia ? 6 years, 6 months ago

{tex}\frac{5m}{10 k m} = \frac{5m}{10000 m} = \frac{1}{2000}{/tex}

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Find the least number of four digits that is a perfect square

Posted by Radhika Rawal 6 years, 6 months ago

CBSE > Class 08 > Mathematics

1 answers

Sia ? 6 years, 6 months ago

The smallest four digit no. = 1000

32² is more than 1000 by 24;
So the least number to be added to 1000 is 24.
Therefore, 1000+24 = 1024 is the smallest four digit number which is a perfect square.

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ANSWER

Linear equation and variable Exercise 2.2 Question 1 Class 8

Posted by Jamil Gaur 6 years, 6 months ago

CBSE > Class 08 > Mathematics

2 answers

Naginakumar Yadav 6 years, 6 months ago

Let the no. To be x A.T.Q, (x-1/2)1/2=1/8 or, 1/2x-1/4=1/8 or, 1/2x=1/8+1/4 or, 1/2x=1+2/8 or, 1/2x=3/8 Or, x=3/8×2/1 or, x=3/4 So, 3/4 is the number

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Sia ? 6 years, 6 months ago

Let the number be

According to the question,

[Multiplying both sides by 2]

[Adding to both sides ]

Hence, the required number is

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ANSWER

Liner equation and variable

Posted by Jamil Gaur 6 years, 6 months ago

CBSE > Class 08 > Mathematics

1 answers

Sia ? 6 years, 6 months ago

Check here for NCERT solutions : <a href="https://mycbseguide.com/ncert-solutions.html">https://mycbseguide.com/ncert-solutions.html</a>

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ANSWER

What is the formula to find angles of regular polygon

Posted by Aman Chaudhary?️?️?? 6 years, 6 months ago

CBSE > Class 08 > Mathematics

3 answers

Naman Aggarwal 6 years, 6 months ago

No of sides =360°

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Naginakumar Yadav 6 years, 6 months ago

Interior angle of a regular polygon =(s-2)×180°

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Yogita Ingle 6 years, 6 months ago

All the Exterior Angles of a polygon add up to 360°, so:

Each exterior angle must be 360°/n (where n is the number of sides)
The Interior Angle and Exterior Angle are measured from the same line, so they add up to 180°.

Interior Angle = 180° − Exterior Angle
Interior Angle = (n−2) × 180° / n

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ANSWER

Find all possible values of x for which the number 7x3 is divisible by 3. Also, find each such number

Posted by Rohit Chauhan 6 years, 6 months ago

CBSE > Class 08 > Mathematics

1 answers

Sia ? 6 years, 6 months ago

If 7x³has to be divisible by 3, Then 7 + x + 3 must be divisible by 3.
7 + x + 3 = 10 + x
We know x can only be a single digit number.
And multiples of 3 between 10 to 20 is 12 , 15, 18
We know that, 12 = 10 + 2, 15 = 10 + 5, 18 = 10 + 8.

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ANSWER

Divide the sum of of 4|13 and -3|2 by their product

Posted by Abhi Kumar 6 years, 6 months ago

CBSE > Class 08 > Mathematics

1 answers

Anshul Dharmale 6 years, 6 months ago

2 7/12

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ANSWER

7/11 of all the money in hamid's bank account is Rs 77,000 How much money does hamid have in his bank account

Posted by Sanidhya Soni 6 years, 6 months ago

CBSE > Class 08 > Mathematics

1 answers

Ananya Garg 6 years, 6 months ago

Let all money = x

According to question,

x* 7/11 = 77,000

x = 77000 * 11/7

x= 121000

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ANSWER

Each interior angle of a regular polygon are 158• .can it be interior angleof regular polygon ?why

Posted by Anas Khan Derwel 6 years, 6 months ago

CBSE > Class 08 > Mathematics

1 answers

Sia ? 6 years, 6 months ago

No, because each exterior angles 180° – 22° = 158°, which is not a divisor of 360°.

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What should be subtract from (3- 2 ) -1 6

Posted by Anas Khan Derwel 6 years, 6 months ago

CBSE > Class 08 > Mathematics

1 answers

Sia ? 6 years, 6 months ago

Let the number to be subtracted be x
{tex}\left( {\frac{3}{4} - \frac{2}{3}} \right) - x = \frac{{ - 1}}{6}{/tex}
{tex}\left[ {\frac{{\left( {9 - 8} \right)}}{{12}}} \right] - x = \frac{{ - 1}}{6}{/tex}
{tex}\frac{1}{{12}} + \frac{1}{6} = x{/tex}
{tex}x = \frac{{(1 + 2)}}{{12}}{/tex}
{tex}x = \frac{3}{{12}}{/tex}
{tex}x = \frac{1}{4}{/tex}

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ANSWER

Add -5/16

Posted by Balbir Singh 6 years, 6 months ago

CBSE > Class 08 > Mathematics

1 answers

Sia ? 6 years, 6 months ago

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ANSWER

2+99999999999/65=5x

Posted by Aditya Singh 6 years, 6 months ago

CBSE > Class 08 > Mathematics

0 answers

ANSWER

Evaluate (6^-2+3^-2)×(5/6)^-2

Posted by Sharmila Ravikumar 6 years, 6 months ago

CBSE > Class 08 > Mathematics

0 answers

ANSWER

B-(2)

Posted by Anushka Khadolia 6 years, 6 months ago

CBSE > Class 08 > Mathematics

1 answers

Aditya Singh 6 years, 6 months ago

B-2 is the answer

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Solve 2x+7/4 = 4x- 8

Posted by Meeta Agrawal 6 years, 6 months ago

CBSE > Class 08 > Mathematics

2 answers

Aditya Singh 6 years, 6 months ago

2x+7/4=4x-8 2x-4x=-8-7/4 -2x=-32-7/4 -2x=-39/4 x=-39/4*1/-2 x=39/8

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Yogita Ingle 6 years, 6 months ago

2x+7/4 = 4x- 8
2x + 7 = 4(4x - 8)
2x + 7 = 16x - 32
16x - 2x = 7 + 32
14x = 39
x = 39/14

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ANSWER

87120 is not a perfect square. Find the smallest number which should be added to make it a perfect square?

Posted by Akshara Gupta 6 years, 6 months ago

CBSE > Class 08 > Mathematics

4 answers

Rahul Sharma 6 years, 6 months ago

No,87120 is not a perfect square because the ending no. Is 0 .whenever the ending no. Is 2,3,7,8,0 these are non perfect square. 591 must be added to get a perfect square.

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Sia ? 6 years, 6 months ago

591 must be added to get perfect square.

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Akshara Gupta 6 years, 6 months ago

But what should be added to make 87120 a perfect square???

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Sia ? 6 years, 6 months ago

87120=2×2×2×2×3×3×5
√87120=2×2×3×√5
to get perfect square we have to multiply it with 5
87120×5=435600

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ANSWER

Chapter 2 exercise 2.2 Qn 8