Direct and Inverse Proportions in One Shot | Maths - Class 8th | Umang | Physics Wallah

📝 For complete notes of Lectures, visit Umang Batch in the Batch Section of PhysicsWallah App/Website.

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NOTE: This batch is completely FREE, you just have to click on the "BUY NOW" button for your enrolment.

In this lecture of Umang batch, Ritik sir is going to teach you the chapter-Direct and Indirect proportions.

Topics covered in this lecture are-
•Introduction
•What is variation?
•What is proportion?
•Direct proportion/variation
•Inverse proportion/variation
and some questions for practice.

There are many other important chapters that we are going to cover in upcoming videos for class 8. Stay tuned with PhysicsWallah Foundation. "

🔴 Details about the batch -

• Recorded Lectures for Class 8th Students.

• PDF Notes of each Lecture will be available on the PW App.

• Weekly Lecture Planner will be uploaded on PW Foundation Community Page.

• Classes will start from 10th January and we will cover the whole syllabus by 10th March.

🎦 Eight Lectures per week will be uploaded.

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[amrit]

I hope Ritik sir continues teaching us in grade 9 😁

[Viral_TOP]

Criminal locks,
Teacher shocks,
Students can't talks,
Ritik sir always rocks.

[narayangouda]

6:31 the answer is increase.
24:40 it is not following the properties of direct proportion.The ratio is not remain same on 15/60.
57:42 the value of the x is 30km.
58:26 the value of the y is 140 minute.
1:03:58 the value of the x is 600cm.
1:03:58 the value of the y is 875cm.
1:04:12 the total numbers of words is 144 words .
1:09:53 it is not following the properties of inverse proportion.
1:13:41 the value of y2 is 2 .
1:16:53 the total numbers of workers is 18 workers.
1:21:34 the value of the x is 30 days.
1:21:41 1.5 hours will it take when the car travels at the speed of 80km/h.
Thank you a lot sir for explanation of the chapter ❤

[GargiTripathi-bv]

Sir, if the duration of your class increases the fun will surely increase as you are a wonderful teacher

[nausheennaureen]

He's the best teacher ever 💯
He's even bending down on his knees so that we can see clearly what is written on the board.
A big salute to him

[Abhishek_rai]

1:04:26
Renu types words an half hour= 540
Words type in 30 min = 540
Words typed in 1min = 540/30=18
Words typed in 8 min = 18x8=144

[Jevendra]

6:38 Increase
24:42 No, sir because All are in the ratio of 1:3 and the last is in 1:4
27:17 Sir the value will be 5 because 60/12=5
57:43 30 km
58:55 135 minutes or 2 hour 15 minutes
1:03:44 x=600cm And y=875cm
1:04:10 144 words
1:13:43 y2=2
1:18:47 18 workers
1:21:36 30 day
1:21:50 90 minutes or 1hour 30 minutes

[army]

8th grade is almost over and I’m seriously gonna miss his teaching 😭 😭

[ranjanamagar]

Exams are near
No need to fear
When ritik sir is hear❤❤❤😅😊

[kamleshdevi]

Vote for studying maths from Ritik sir in class 9👇👇

[AtomicStudent]

1:21:48 homework question

Ans 30 days

🎉🎉

[hanshikasoni]

If ritik sir's total class time increases the fun will always increase sir 👍 😀😀

[kaushalkishor]

Exams are near 😌
No need to fear
Because physics wallah
Sir is here 🥰🥰🥰
Dear baccho 🥰🥰🥰

[iamthepianist]

I was stuck on 45 % then in finals my friend preferred me to watch physics walla and then i scored 97 % by taking efforts and because of ritik sir.❤❤❤❤

[lalitabhattalalitabhatta]

24:43 yes sir it is directly proportional and the constant value is 1/3

[ananyasachan]

6:31 Increase
24:42 No, because all are in the ratio of 1:3 and lasi is in 1:4
57:44 30 km
58:35 140 min
1:3:52 x is 600cm and y is 875cm
1:4:19 144 words
1:13:55 y2 is 2
1:17:4 18 workers
1:21:30 30 days
1:21:41 1.5 hrs

[AnnuYadav-sosq]

58:30
Ans.
1. 30km
2. 140min or 2hrs 20min

[Iwxorz]

The answer of the question that is "A train is moving at a uniform speed of 75 km per hour"( 53:27 )
1) how far will it travel in 24 minutes?
2) in how much time will it cover 175 km?
*ANSWER*
DISTANCE - 75, x², 175
Time taken - 60, 24, y³
1. So, for finding x² we will use the method - 75x24/60= 30 (first question solved )
2. Now, for finding the time we have to do -
24x175/30 = 140 min ...😊(2hr and 25 mins) i hope this is helpful for you all

[nightmareplayz]

00:02 Direct and Inverse Proportions in Class 8th Maths
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08:11 Direct and Inverse Proportions
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15:34 Direct and inverse proportions explained through examples
18:02 Understanding direct proportion in quantities
23:27 Direct and inverse proportions explained with examples.
26:00 Understanding direct and inverse proportions
31:49 Understanding direct and inverse proportions in distance and quantity
33:59 The concept of direct proportionality in relation to petrol and distance.
38:47 Understanding direct proportionality in cost and quantity
41:19 Direct and Inverse Proportions explained in 8th grade Math
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47:12 Understanding direct and inverse proportions
51:54 Understanding conversion between grams and kilograms
54:40 Time and distance are directly related.
58:42 Understanding direct and inverse proportions in mathematics
1:00:45 Understanding direct and inverse proportions
1:05:17 Understanding Direct and Inverse Proportions
1:07:29 Understanding direct and inverse proportions
1:11:57 Understanding direct and inverse proportions
1:14:09 Understanding direct and inverse proportions
1:18:52 Understanding direct and inverse proportions
1:21:07 Direct and inverse proportions explained

[rachnasharma]

6:31the answer is increase.
24:40 it is not following the properties of direct proportion.The ratio is not remain same on 15/60.
57:42 the value of the x is 30km.
58:26 the value of the y is 140 minute.
1:03:58 the value of the x is 600cm.
1:03:58 the value of the y is 875cm.
1:04:12 the total numbers of words is 144 words .
1:09:53 it is not following the properties of inverse proportion.
1:13:41 the value of y2 is 2 .
1:16:53 the total numbers of workers is 18 workers.
1:21:34 the value of the x is 30 days.
1:21:41 1.5 hours will it take when the car travels at the speed of 80km/h