CLEAR
Toprankers-Info

+91 7676564400

Mobile App

Get it on Google Play
Discussions
Tags:

Articles

Discussions
Submit Discussion
Isbah Jehan

· started a discussion

· 1 Months ago

calculation of inner wall cost (Question:233112.1)

why is the 2*15 taken two times while calculating inner wall cost?

Question:
DIRECTIONS: Read the following data and answer the question that follow it.


The dimensions of the base of a house are 20 m × 15 m and its height is 3 m. It consists of two rooms whose floor dimensions are each 10 m × 5 m, a hall of 20 m × 5 m, a store rooms of 8 m × 5 m and a kitchen of 12 m × 5 m. All the outer walls of the house are painted at the cost of Rs. 210/sq m and all the inner walls are painted at the cost of Rs. 150/sq m.

What is the ratio of the total cost of painting to the outer surface of the walls to that of painting the inner surface of the walls?
Options:
A) 641 : 825
B) 49 : 85
C) 231 : 435
D) 9 : 225
E) None of these
Solution:

Ans: (b) The Required Ratio=

Outer Surface of the wall: Inner surface of the wall

Inner Surface of the wall = Two rooms of dimension 10 m × 5 m + A Hall of 20 m × 5 m + A store room of 8 m × 5 m+ A kitchen of 12 m × 5 m=2×2 (30+15)+2×(60+15)+2×(24+15)+ 2×(36+15)

=180+150+78+102=510 square metre

Cost=510×150=76500

The required ratio = 44,100 : 76500

= 44100 : 76500

= 441 : 765

= 49 : 85

Knowledge Expert

· commented

· 1 Months ago

Dear Student,
View the solution explanation after clicking on report. Team TR.
-logo
We at aim to provide most comprehensive content & test for practice which is carefully divided into various chapters and topics to help you focus on your weak areas.Our Practice mock test gives you unmatched analytics to help you realize your strong areas,time management and improvement areas.Our Short & Crisp notes on each topic will help you to quickly revise the topic along with the tips & tricks of the exams.
More About
-Info
-Info

Mobile App

Get it on Google Play
About Us Campus Ambassador Careers Contact Us Refund Policy

All Rights Reserved Top Rankers

User Policy
Disclaimer
Terms & Conditions