Home
JoinComplore
B-Schools
Announcements
Knowledge Center
 
Home » Forums » Complore Tests » Quant Tests
sponsored
3 replies [Last post]
Fri, 11/20/2009 - 19:12
RAJ.
RAJ.'s picture
Joined: 09/13/2009
Points: 0
Groups: None
User offline. Last seen 8 weeks 5 days ago.

view question and its corresponding solution related to this thread.
------------------------------------------------------------------------

Option (5) 20 cm

Top
Fri, 11/20/2009 - 19:22
#1
RAJ.
RAJ.'s picture
Joined: 09/13/2009
Points: 0
Groups: None
User offline. Last seen 8 weeks 5 days ago.
Re: Question of the day - 21.11.09

Sorry..guys by mistake i took the side DE 4 and ended with a wrong answer.

It will be 1/2(3+6)*4 = 18 cm2

i.e option (1)

Top
Fri, 11/20/2009 - 19:37
#2
nikhilguddu2003
Joined: 10/25/2009
Points: 0
Groups: None
User offline. Last seen 11 weeks 4 days ago.
Re: Question of the day - 21.11.09

yes anser will be option (5)

Top
Sat, 11/21/2009 - 06:14
#3
vinay1999
Joined: 05/19/2009
Points: 3
Groups: None
User offline. Last seen 16 hours 22 min ago.
Re: Question of the day - 21.11.09
From the figure 
 
GN = GP
DP = DM  which is equal to 1 (DE - rad of circle)
 
Now say GN =GP = x
 
Drop a perpendicular from D on to GF  say the point as A.
 
AN =1.
 
From the rt angled triangle GDA
 
GD2 =  DA2+ GA2
 
(GP+PD)2 = 42+ (GN-AN)2
 
(x+1)2 = 16 + (x-1)2 
 
solving which x = 4 
 
GA = 4 -1 =3 
 
Now area of trapezium  , ar(rectangle DEFA) + ar(triangle  GDA)  = (4*3)+(1/2*4*3 ) = 18 
 
option 1. 
 
 
 
Top