Banner 0
Banner 1
Banner 2
Banner 3
Banner 4
Banner 5
Banner 6
Banner 7
Banner 8
Banner 9

Q.

A room is 8m long, 6m broad and 5.5m height . It has one of the Dimension 2.5m by 2m and 2 Windows each of dimensions 1.5 by 1 m.[[1]]  the cost of whitewashing the walls at Rs.3.20 per square meter.


see full answer

Your Exam Success, Personally Taken Care Of

1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.
An Intiative by Sri Chaitanya

(Unlock A.I Detailed Solution for FREE)

Best Courses for You

JEE

JEE

NEET

NEET

Foundation JEE

Foundation JEE

Foundation NEET

Foundation NEET

CBSE

CBSE

Detailed Solution

Concept- . The cost of white washing the walls at Rs.3.20per sq.m. is Rs. 819.2. The answer to this question includes the room's length, width, and height as well as its dimensions and those of its windows. We need to calculate the cost of painting the room white. The price per square meter for whitewashing the wall is Rs. 3.20IMG_256To determine the overall cost of whitewashing a room, we must first determine its surface area and multiply that figure by the cost per square foot.
Here, the measurements of the room are 8 meters long, 6 meters wide, and 5.5 meters high. One door is 2.5 meters by 2 meters, and two windows are 1.5 meters by 1 meters.
We must determine how much the whitewashing will cost.
Thus, the room's lateral surface area is first.
We are aware that the cuboid's lateral surface area is equal to 2h(l+b) .
Using the formula =2h(l+b) =2×5.5(8+6) =154 m2,
Once more, we must identify the door area.
Door area = l b
Where l= 2 m and b= 2.5 m, or 2× 2.5, equals 5 m2
= 1.5 m and b = 1 m = 2× 1.5× 1 =3 m2
Area of walls - Area of door and two windows equals the area that needs to be whitewashed.
Wall surface area to be whitewashed: 264-5 -3 = 256 m2.
Now that we know how much it will cost to whitewash the walls, we can calculate the price: cost of whitewashing = 256 x 3.20, or Rs. 819.2.
Hence, the correct answer is Rs. 819.2
 
Watch 3-min video & get full concept clarity
score_test_img

courses

No courses found

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Get Expert Academic Guidance – Connect with a Counselor Today!

best study material, now at your finger tips!

  • promsvg

    live classes

  • promsvg

    progress tracking

  • promsvg

    24x7 mentored guidance

  • promsvg

    study plan analysis

download the app

gplay
mentor

Download the App

gplay
whats app icon
personalised 1:1 online tutoring