hi all
for ma information i stuck in ths problem althu i blv it s pretty easy
where it says :
a square wall is covered with square tiles, there are 85 tiles altogether along the 2 daignols
how many tiles are there on the whole wall??
please if u can draw n show steps i w be more thn grateful
manar
5-Day Free Trial
5-day free, full-access trial TTP
Available with Beat the GMAT members only code
MORE DETAILS
mensuration !!
This topic has expert replies
-
atulmangal
- Legendary Member
- Posts: 1112
- Joined: Sat Feb 26, 2011 11:16 am
- Thanked: 77 times
- Followed by:49 members
marmar29 wrote:hi all
for ma information i stuck in ths problem althu i blv it s pretty easy
where it says :
a square wall is covered with square tiles, there are 85 tiles altogether along the 2 daignols
how many tiles are there on the whole wall??
please if u can draw n show steps i w be more thn grateful
manar
I'm not sure about the part in red...if the Square tiles are placed along the diagonal then how is it possible to cover the whole square wall with square tiles...????
-
Frankenstein
- Legendary Member
- Posts: 1448
- Joined: Tue May 17, 2011 9:55 am
- Location: India
- Thanked: 375 times
- Followed by:53 members
Hi,Vish_ wrote:I'm getting 924.5 UnitSq as answer. If there are 85 tiles on each diagonal then the answer will be 1849.
Let each of the square tile is of side length be 1unit. Number of tiles along both diagonals is 85. So, each diagonal has 43 tiles and the length of the diagonal is 43.sqrt(2). So, side length of the wall is 43. So number of tiles required is 43^2 = 1849.
Cheers!
Things are not what they appear to be... nor are they otherwise
Things are not what they appear to be... nor are they otherwise
-
cans
- Legendary Member
- Posts: 1309
- Joined: Mon Apr 04, 2011 5:34 am
- Location: India
- Thanked: 310 times
- Followed by:123 members
- GMAT Score:750
let squares be of dimension 1*1a square wall is covered with square tiles, there are 85 tiles altogether along the 2 daignols
how many tiles are there on the whole wall??
and a be the side. Thus number of squares = a*a
no. of squares on a diagonal =a
no. of squares on other = a
But they intersect at a square (i.e. one square is shared by both)
thus 2a-1=85
a=43
a^2 = 1849
If my post helped you- let me know by pushing the thanks button 
Contact me about long distance tutoring!
[email protected]
Cans!!
Contact me about long distance tutoring!
[email protected]
Cans!!
-
sunilrawat
- Master | Next Rank: 500 Posts
- Posts: 112
- Joined: Sun Jun 13, 2010 9:20 am
- Thanked: 5 times
- GMAT Score:640
With 85 tiles in the two diagonals, there are 43 tiles along one diagonal.marmar29 wrote:hi all
for ma information i stuck in ths problem althu i blv it s pretty easy
where it says :
a square wall is covered with square tiles, there are 85 tiles altogether along the 2 daignols
how many tiles are there on the whole wall??
please if u can draw n show steps i w be more thn grateful
manar
Thus total no. of tiles = 43^2 = 1849
