CGL 2012 Tier 2 Preparations and Results

mickym · September 10, 2012, 8:34pm

@JS-M

ek baar common tangents wale formulas share karna

mickym · September 10, 2012, 8:35pm

@mickym said: @JS-M
ek baar common tangents wale formulas share karna

@JS-M also find the error in the above sentence

js-m · September 10, 2012, 8:36pm

@mickym said: @JS-M
ek baar common tangents wale formulas share karna

The radii of two circle z 5 & 3 cm and distance between their centres z 24 cm, then length of transverse common tangent is?

js-m · September 10, 2012, 8:40pm

@mickym said:
@JS-M also find the error in the above sentence

@mickym said: @JS-M
ek baar common tangents wale formulas share karna

................pta nahi kya error hai

1. Transverse common tangent=sqrt(d^2-(r1+r2)^2)

2. Direct common tangent =sqrt(d^2-(r1-r2)^2)

mickym · September 10, 2012, 8:42pm

@JS-M said:
The radii of two circle z 5 & 3 and distance between their centres = 24 then length oftransverse common tangent is?

16 rt2

iska direct formula koi hai kya

js-m · September 10, 2012, 8:46pm

@mickym said:
16 rt2

iska direct formula koi hai kya

uppr likha hai yr......

mickym · September 10, 2012, 8:47pm

@JS-M said:
uppr likha hai yr......

Look

Two circles of radius 4cm, and 9cm touch each other externally. A common tangent AB is drawn to these two circles, A and B lie on the two circles respectively. Then the radius of the circle which touches the given circles, and also whose tangent is line AB is

js-m · September 10, 2012, 8:57pm

@mickym said:
Look
Two circles of radius 4cm, and 9cm touch each other externally. A common tangent AB is drawn to these two circles, A and B lie on the two circles respectively. Then the radius of the circle which touches the given circles, and also whose tangent is line AB is

1.44 ??

mickym · September 10, 2012, 8:59pm

@JS-M said:
1.44 ??

explain it to me BRO

js-m · September 10, 2012, 9:13pm

@mickym said:
explain it to me BRO

yr u know that.........jo circle hoga wo dono circle ke bich me banega.....quite smaller one

Now using direct tangent formula tangent =12

Now try to find the direct tangent b/w circle with radius 4 and r

similarly find the direct tangent b/w circles with radius 9 and r

let it be T1+T2

so Put T = T1+T2 ..........u will get r=1.44,

js-m · September 10, 2012, 9:16pm

@mickym said:
explain it to me BRO

u there???

mickym · September 10, 2012, 9:18pm

@JS-M said:
yr u know that.........jo circle hoga wo dono circle ke bich me banega.....quite smaller one
Now using direct tangent formula tangent =12
Now try to find the direct tangent b/w circle with radius 4 and r
similarly find the direct tangent b/w circles with radius 9 and r
let it be T1+T2
so Put T = T1+T2 ..........u will get r=1.44,

thnx bro

mickym · September 10, 2012, 9:19pm

@JS-M said:
u there???

yup

js-m · September 10, 2012, 9:19pm

@mickym said:
thnx bro

yr........main bhi to questn puchuga tumse ........then no need 4 thanx

mickym · September 10, 2012, 9:21pm

@JS-M said:
yr........main bhi to questn puchuga tumse ........then no need 4 thanx

to pucho .....

js-m · September 10, 2012, 9:27pm

A number N leaves a remainder 11 when divided by M..and remainder 92 when divided by 8M...what will be the remainder when divided by 4M???

1)11 2)46 3)92 4) 38

yr easiest way batao to zara isko solve karne ka......without assumng any value??

js-m · September 10, 2012, 9:28pm

@mickym said:
to pucho .....

yr post check karo questn dala hai??

cbiofficer · September 10, 2012, 9:33pm

@JS-M said: A number N leaves a remainder 11 when divided by M..and remainder 92 when divided by 8M...what will be the remainder when divided by 4M???1)11 2)46 3)92 4) 38
yr easiest way batao to zara isko solve karne ka......without assumng any value??

iska ans 46 h kya..? nt sure

js-m · September 10, 2012, 9:34pm

@cbiofficer said:
iska ans 46 h kya..? nt sure

........

cbiofficer · September 10, 2012, 9:37pm

@JS-M said:
........

den