Official Quant thread for CAT 2013

hari_bang · January 5, 2013, 10:19am

@joyjitpal said:
ABCD is a rectangle. The points P, Q lie inside it with PQ parallel to AB. Points X, Y lie on AB (in the order A, X, Y, B) and W, Z on CD (in the order D, W, Z, C). The four parts AXPWD, XPQY, BYQZC, WPQZ have equal area. If BC = 19, PQ = 87, XY = YB + BC + CZ = WZ = WD + DA + AX, then the length of AB isa) 241 b) 163 c) 217 d) 193

wht a co incident?

i mgng to ask dis quess?

ANS-193

hari_bang · January 5, 2013, 10:20am

@joyjitpal said:
A triangle has sides 13, 14, 15. It is rotated through 180 degrees about its centroid to form an overlapping triangle. Find the area of the union of the two trianglesa) 84 b) 126 c) 56 d) none

84

haha

hari_bang · January 5, 2013, 10:22am

@hari_bang said:
dnt knw ans?hw did u solve it?

????

joyjitpal · January 5, 2013, 10:25am

@hari_bang said:
84haha

how? approach

hari_bang · January 5, 2013, 10:29am

@DarkHorse25 Plz provide solution???

I think...

ur geomtry so well...

hari_bang · January 5, 2013, 10:29am

@joyjitpal said:
how? approach

mjhe nhi aata..main to ans dekh k bole rha tha...

hari_bang · January 5, 2013, 10:31am

@DarkHorse25 said:
tumhe jo bhi aata hain ..aachcha hi aata hain..

one more

A and B are two points in a plane which are 10 m apart.The angle of elevation of tower as seen from A and B are respectively as 30 and 6o degrees..If AB subtends an angle of 60 at the foot of the tower, find the height of the tower.

darkhorse25 · January 5, 2013, 10:33am

@hari_bang said:
@DarkHorse25 Plz provide solution???I think...ur geomtry so well...

I am not good in geometry

... woh to kabhi kabhi aa jata hain answer.. jaise iss rectangle wala ques huya hain.. trinangle wala nehi ho raha hain .. triangle ques ka approach bolo...

hari_bang · January 5, 2013, 10:35am

@DarkHorse25 said:
I am not good in geometry ... woh to kabhi kabhi aa jata hain answer.. jaise iss rectangle wala ques huya hain.. trinangle wala nehi ho raha hain .. triangle ques ka approach bolo...

triagnometry to achhi hai naa:)

darkhorse25 · January 5, 2013, 10:39am

@joyjitpal said:
A triangle has sides 13, 14, 15. It is rotated through 180 degrees about its centroid to form an overlapping triangle. Find the area of the union of the two trianglesa) 84 b) 126 c) 56 d) none

OA?

rockstar24 · January 5, 2013, 10:40am

my quant is a bit weak..scored just 6 in IIFT & 69 in NMAT..starting again for CAT'13..i have arun sharma,time & CL packages ..how should i approach now to improve??

darkhorse25 · January 5, 2013, 10:41am

@joyjitpal said:
A triangle has sides 13, 14, 15. It is rotated through 180 degrees about its centroid to form an overlapping triangle. Find the area of the union of the two trianglesa) 84 b) 126 c) 56 d) none

112

joyjitpal · January 5, 2013, 10:42am

@DarkHorse25 said:
112

approach bhai

darkhorse25 · January 5, 2013, 10:44am

@joyjitpal said:
approach bhai

sahi ya galat... yeh to bolo.. OA kya hain?

darkhorse25 · January 5, 2013, 10:45am

@joyjitpal said:
approach bhai

waise triangle ka area hain 84 .. so union hain to multiplied with 4/3 .. 84*4/3=112...

not very sure..

joyjitpal · January 5, 2013, 10:46am

nahi hai OA
isi liye toh approach mang raha hu

hari_bang · January 5, 2013, 10:46am

@DarkHorse25 said:
OA?

hw?

darkhorse25 · January 5, 2013, 10:50am

@joyjitpal said:
nahi hai OA isi liye toh approach mang raha hu

union 84*(1+1/3)=112 ...aur intersection 84*2/3=56

darkhorse25 · January 5, 2013, 10:55am

@joyjitpal said:
nahi hai OA isi liye toh approach mang raha hu

got the approach?

joyjitpal · January 5, 2013, 10:59am

@DarkHorse25 said:
got the approach?

nope can u plz elaborate union me (1+1/3) kaha se aya?