My Math Forum  

Go Back   My Math Forum > High School Math Forum > Algebra

Algebra Pre-Algebra and Basic Algebra Math Forum


Reply
 
LinkBack Thread Tools Display Modes
July 31st, 2012, 01:48 AM   #1
Newbie
 
Joined: Jul 2012

Posts: 27
Thanks: 0

Rectangular Box

The dimensions of a rectangular box are in the ratio 2:3:4 and the difference between the cost of covering it with sheet of paper at the rate of Rs.4/- and Rs. 4.50 per square meter is Rs 416. The dimensions of the box are:

1)6,9,12
2)8,12,16
3)10,15,20
4)12,18,24
5)none

Please show steps...I don't know how to start...
drunkd is offline  
 
July 31st, 2012, 02:12 AM   #2
Senior Member
 
MarkFL's Avatar
 
Joined: Jul 2010
From: St. Augustine, FL., U.S.A.'s oldest city

Posts: 12,211
Thanks: 521

Math Focus: Calculus/ODEs
Re: Rectangular Box

Let 2x be the smallest dimension of the box, then 3x and 4x are the other larger dimensions. The surface area S of the box is then:



We are told then that:



Can you proceed from here?
MarkFL is offline  
July 31st, 2012, 02:23 AM   #3
Newbie
 
Joined: Jul 2012

Posts: 27
Thanks: 0

Re: Rectangular Box

Thanks Mark..!!
You are a true life saver....
drunkd is offline  
July 31st, 2012, 02:38 AM   #4
Senior Member
 
MarkFL's Avatar
 
Joined: Jul 2010
From: St. Augustine, FL., U.S.A.'s oldest city

Posts: 12,211
Thanks: 521

Math Focus: Calculus/ODEs
Re: Rectangular Box

Glad to help!

What was your conclusion?
MarkFL is offline  
July 31st, 2012, 05:20 AM   #5
Newbie
 
Joined: Jul 2012

Posts: 27
Thanks: 0

Re: Rectangular Box

8,12,16.....
drunkd is offline  
Reply

  My Math Forum > High School Math Forum > Algebra

Tags
box, rectangular



Thread Tools
Display Modes


Similar Threads
Thread Thread Starter Forum Replies Last Post
Rectangular mared Algebra 1 December 3rd, 2013 09:23 AM
Rectangular Form aaron-math Complex Analysis 5 September 24th, 2013 08:41 AM
rectangulars fit in one rectangular PGO Elementary Math 2 October 10th, 2010 04:33 AM
rectangular hyperbola mikeportnoy Algebra 4 December 10th, 2009 06:46 PM
From Polar to Rectangular symmetry Algebra 1 September 26th, 2007 11:42 AM





Copyright © 2019 My Math Forum. All rights reserved.