Mensuration | ONE SHOT | Chapter 9 | Class 8 | BYJU's

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[alkagehlawat]

Ma'am, you are really so good. the way you teach is totally mind-blowing. my maths exam is the day after tomorrow and I was not able to understand this topic at all until now. just after one video lecture of yours I really understood it and I think I will remember it now for my whole lifetime. You are a very great teacher indeed. thank you very much for teaching us.

your grateful student
Tripti Dhanda

[shourya._]

Thank you mam for this wonderful session 😀.It was really helpful for me.
Answer of HW QUESTION 👇🏻
SOLUTION:
Length 'l' of the cabinet = 2 m
Breadth 'b' of the cabinet = 1 m
Height 'h' of the cabinet = 1.5 m
Area of the bottom of cabinet = l × b
Since the cabinet is cuboidal in shape,
Total surface area of the cabinet = 2(l × b + b × h + h × l).
Area of the cabinet that was painted = (Total surface area of the cabinet) - (Area of bottom of the cabinet)
= 2(l × b + b × h + h × l) − l × b
= 2(b × h + h × l) + l × b
= 2 × (1 × 1.5 + 1.5 × 2) + 2 × 1 m²
= 2 × 4.5 + 2 m²
= 11 m²
Therefore the area of the cabinet that was painted is 11 m².
SUGGESTION: Mam please bring RD Sharma & Olympiad Questions of this chapter.

[HimanshiSadhu]

1:00:41
By opening that Cylinder as rectangle and then measure the length and breath

[selfstudywithvaidehipatel]

Why is khushbu mam not coming on byjus 678 channel ?
Btw the session was amazing 😍🤩 All doubts clear🎉🎉

[AfsheenJAlam]

Maam curved surface area of cylinder is also called Lateral surface area of cylinder

[anithamukthapuram]

198000 is the correct answer ma'am can you tell me ma'am

[dancewithsahilshree]

But mam in the book the surface area of the circle is 2πr(r+h)

[adish]

"Hi Byjus team! I'm Adish, and I just wanted to say how much I've been enjoying your Class 8 Maths sessions. They've been incredibly helpful as I prepare for my upcoming exam on Monday. I was hoping if it's possible to have a revision session before then, focusing on important maths chapters and covering the frequently asked questions in exams. It would be immensely beneficial for my last-minute preparations. Also, a big shoutout to the instructor for delivering such engaging and informative classes, even when I'm watching the older ones. Keep up the awesome work! Thank you!"


By The Way here is the homework answer:

l=2m
b=1m
h=1.5m

LSA of Cuboid=2h*(l+b)
=2*1.5*(2+1)
=3*3
=9m^2

Area of the top =(l*b)
=2*1
=3^2

.:. Area Painted = LSA of the cuboid+Area of the top
=9+2
=11m^2

[Disha_]

Homework answer
11m²
I really liked this session it was very useful.. ❤
You teach very nice.
Thank you so mam... 😇

[neelamchaudhary]

*Homework answer*
Area of wall painted except the bottom
= 2h(l+b) + lb
= 2× 1.5 (1+2) + (1+2)
= 3 × 3 + 2
= 9 + 2
= 11m²

I want the video of ncert solution of chapter 9 algebraic expressions and also of this chapter.
Thanks for this amazing session mam 🤩🤩This session was amazing 😊

[currenteducationzp]

Total surface area of cabinet =2(lb+bh+hl)

=2(1)(2)(1)(1.5) + (2)(1.5)

=13

Area of base cabinet = lb =2

Surface area painted =13-2=11m².

[Shourya_army]

mam please bring NCERT and RD sharma solutions of both chapters

[nishi]

all the concepts were easy but volume and capacity conversion were difficult . please bring a session on volume and capacity conversions from basics . please. by the way, the session was super cool and interesting

[lakshyata]

Mam the answer of the home work is 11m cube and mam bring RD Sharma questions and solutions. Mam this class was amazing thank you mam

[Euphoria._-_]

Master plan for the legends who don't want to study and just want to pass
Tmrw is my exam i am not
Stu-DYING
So
60 marks paper
13 chapter (full book)
Plan
Study main 2-3 chapter(optional)
6 marks pie chart
6 marks graph
Just Prepare this
8 marks mcq ask from your freind in exam from sign language
6+6+8=20
Something which you studied before knowing this plan
20+5-6 marks
Total 26 marks 😂🎉
21 is passing
Congo you save your time

[priscillamartin]

1, 98, 00, 000 is the answer for a road roller question

[SamridhPrasad-deux]

thank you mam you gave the perfect defination of area it was very easy to undeerstand

[sushilchandrapandit]

Ans - 11m².
Ma'am it's a request please provide summary and mindmaps for this chapter and all the chapters in maths.

[Dhanieshwari]

Mam please 🥺 give explanation to this IMO question:

Class 8

SAMPLE PAPER 01

SECTION 01 LOGICAL REASONING

Payal, Honey, Amit, Birju, Deepak, Riya and Firoz are sitting around a circular table, facing the centre. Riya is not second to the left of Deepak and Deepak is not an immediate neighbor of Birju. Amit is third to the right of Firoz. Birju is second to the left of Firoz.

[vaidehipatel]

mam its a fabulous session just one request plz cover all the NCERT questions of this chapter as we have difficulty in questions.BTW YOU TUCH INCREDIBLY WELL.