@chhabrakaran29 sir the ans given is 7/10 ........5/6 even nt in option . idk hw ??
@Subhashdec2 said:bhai shouldnt the second equation be 2/F -2/S=1/60?
haan sorry....... actually typo.........
@albiesriram said:
my mind got exhausted but thanks for this question it helped me revise my concepts
area will be 144
25/144=a-119/a
a=144
@Abir1103 said:Q.kaushik is 1.5 times more efficient than ravi . kaushik can do a piece of work in 20 days . wht portion of the total work can both of them together complete in 10 days ???soln needed plz .
25/30
5/6
@abhishek.2011 said:my mind got exhausted but thanks for this question it helped me revise my conceptsarea will be 14425/144=a-119/aa=144
isko thoda elaborate karona...
@Dexian said:isko thoda elaborate karona...
bhai dekho
i will elaborate everything but pehle ask albeis bhai that he should name every corner of the triangle in his figure.after that common ho jaega figure and i will explain,without it figure ki naming smjhana its difficult
albeis bhai post the figure of the triangle again but this time name every point.then i shall explain.
@albiesriram
@abhishek.2011 said:bhai dekhoi will elaborate everything but pehle ask albeis bhai that he should name every corner of the triangle in his figure.after that common ho jaega figure and i will explain,without it figure ki naming smjhana its difficultalbeis bhai post the figure of the triangle again but this time name every point.then i shall explain.
did it in hustle mode.. couldnt doit in the order.. 😞 Assume that central point as R
@albiesriram said:did it in hustle mode.. couldnt doit in the order.. Assume that central point as R
dexian bhai
it requires use of similar triangles
triangle kpr is similar to yrq
so pr:rq=root(4/9)
pr:rq=2:3
similarly triangle kpr is similar to rzw
so pr/zw=root(4/49)
zw=7
now as in triangle rzw
0.5*h*7=49
h=14 ( h is altitude of triangle rzw)
now in parallelogram przb
bz=pr
area =0.5*(2+2)*14
area =28
similarly in parlellogram rqwc
area=42
as triangle apq is similar to abc
let area of abc be A
A-(28+42+49)/A = [5/(2+7+3)]^2
A-119/A=25/144
SOLVING THIS A COMES OUT AS 144
see, triangles PXR , RYQ , ZRW , ABC are similar.( Because xw and ZY are transversals between PQ and BC . ) also look PR+QR+ZW = BC 
. and thats the end of that..
. and thats the end of that..
@albiesriram said:
@albiesriram said:
Ast=A
Arnold=B
Afzal=C
x hours all working together
A=x+6
B=x+1
C=2x
1/x+6 +1/x+1 +1/2x =1/x
x=2/3=40 mins
Arnold=B
Afzal=C
x hours all working together
A=x+6
B=x+1
C=2x
1/x+6 +1/x+1 +1/2x =1/x
x=2/3=40 mins
@albiesriram said:
40 hoga
option c
tgough i did it with the help of options,if some1 has a better approach do share.
-2/5 is option 1. btw..