@anantn said:@mailtoankit how did you deduce that the entire thing is right angle triangle...its nowhere specified o.o
6,8,10...
mailtoankit
oh yeah... sorry overlooked that..
@meenu05 said:Abcd is a parallelogram Ab = 8 , Ad = 4 and Ec = 4 . If DE is an angle bisector of adc then find the length of Ed ?
Yeah it's 9.6 or 4_/2
In a triangle Abc length of Ab and Ac is 8 . The radius of the incircle drawn in the triangle Abc with the enter o is 2 and the length of Ao is 4 cm . Find the length of the side Bc ?
@meenu05 said:In a triangle Abc length of Ab and Ac is 8 . The radius of the incircle drawn in the triangle Abc with the enter o is 2 and the length of Ao is 4 cm . Find the length of the side Bc ?
2 root 7, or 2_/7....
In value it would be 5.29 ???
@MANJULNEOGI said:Two boys A and B are at two diametrically opposite points on a circle. At oneinstant the two start running on the circle; A anticlockwise with constant speed vand B clockwise with constant speed 2v. In 2 minutes, they pass each other forthe first time. How much later will they pass each other for the second time?1. 1 minute2. 2 minutes3. 3 minutes4. 4 minutes
Suppose L be length of circle
The time taken to meet first time=L/6V
L/6v=2
L/v=12
They meet at one point..Now time taken to meet for second time=L/3v
12/3=4min
@meenu05 said:In a triangle Abc length of Ab and Ac is 8 . The radius of the incircle drawn in the triangle Abc with the enter o is 2 and the length of Ao is 4 cm . Find the length of the side Bc ?
4 root 7
@karan20 said:For each positive integern, define a sequence;Here [x] denotes the largest integer not greater than x, for any real number x.If n ˆˆ{1, 2, 3, €Ś, 2012} then what is the number of n for which an > an + 1.OPTIONS 1) 41 2) 43 3) 45 4) 47
Is it 43?
@gnehagarg said:Can anyone explain questions in attachment?
Question 17 (post #11136)
Lets find the probability that a triangle will form
Suppose initially the stick is broken into two parts (one of length 'x' and '1 - x')
When x > 1 - x
=> x > 1/2
Now x is further divided into 4x/7 and 3x/7
1 - x > 4x/7 - 3x/7
1 - x > x/7
x
When 1 - x > x
=> x
=> x
Now 1 - x is further divided into 3(1 - x)/7 and 4(1 - x)/7
x > 4(1 - x)/7 - 3(1 - x)/7
=> x > 1/8
So, probability = (7/8 - 1/8)/1 = 3/4
So, probability that a triangle will not form = 1 - 3/4 = 1/4
As rise of 20% in the price of redefined groundnuts oil a family in forced to buy 1kg less for rs. 180.Find the original price of refined groundnuts oil per kg. ??
@shanu18 said:As rise of 20% in the price of redefined groundnuts oil a family in forced to buy 1kg less for rs. 180.Find the original price of refined groundnuts oil per kg. ??
30?
@shanu18 said:@maddy2807 approach plz ??
let original price be X
acc to the question. price has increased by 20%
new price= 1.2X
now,
180/X-180/1.2X = 1
solve for X
@shanu18 said:As rise of 20% in the price of redefined groundnuts oil a family in forced to buy 1kg less for rs. 180.Find the original price of refined groundnuts oil per kg. ??
lets say the family used to buy x kgs early
so price per kg = 180/x
now this increases by 20% = 180/1.2x = 150/x
180/x-180/1.2x = 1
x = 30
@shanu18 said:As rise of 20% in the price of redefined groundnuts oil a family in forced to buy 1kg less for rs. 180.Find the original price of refined groundnuts oil per kg. ??
180/x-180/1.2x=1
x=30
The max value of 1+sin(pi/4+k)+2cos(pi/4-k) for real values of k is
a)3
b)5
c)4
d)none of these
a)3
b)5
c)4
d)none of these
@19rsb said:The max value of 1+sin(pi/4+k)+2cos(pi/4-k) for real values of k isa)3 b)5c)4 d)none of these
1+sin(pi/4+k)+2cos(pi/4-k)
= 1 + (1/√2)(Sink + Cosk) + √2(Cosk + Sink)
Max = 1 + (√2)(1/√2) + (√2)(√2) = 4
Max = 1 + (√2)(1/√2) + (√2)(√2) = 4