Latest Elitmus Aptitude Question SOLUTION: there is a rectangle.Its area is equal to the area of the circle drawn with its length as the diameter. the perimeter of the rectangle is m times the perimeter of the circle. wh

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(#M40017630) ELITMUS Numerical Ability question Keep an EYE

there is a rectangle.Its area is equal to the area of the circle drawn with its length as the diameter. the perimeter of the rectangle is m times the perimeter of the circle. what is the value of m?
A)1/2+2/pi
B)2pi
C)2/Pi
D)cant be determined

Asked In Elitmus Akanksha Srivastava (11 years ago)

Unsolved Read Solution (9)

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Read Solution (9) :

jitendra singh  (11 years ago)

1/2+2/pi
let a is length; b width. so a is the dia of circle.
a*b=pi/4a^2
b/a=pi/4
nw 2(a+b)=pi*a
so 2/pi+1/2

Is this solution Helpfull? Yes (35) | No (4)  

shakti prakash mishra  (11 years ago)

l*b=pi*r^2
since circle is drawn from the length of the rectangle so radius = l/2
l*b=pi*l^2/4
b=pi*l/4
also,
2(l+b)=m(2pi*r)
l+b=pi*r*m
l+pi*l=pi*l/2*m
m=1/2+2/pi

Is this solution Helpfull? Yes (25) | No   

Akanksha Srivastava  (11 years ago)

Hey Jitendra can u solve some more questions that comes in elitmus. As it takes so much tym to type all the questions.Tell me ur mail id so dat i can frwd the elitmus paper

Is this solution Helpfull? Yes (5) | No (4)  

AVINASH KUMAR  (11 years ago)

AKANKSHA SRIVASTAVA please send me the paper
email avinashsingh56@gmail.com
i will solve it

Is this solution Helpfull? Yes (1) | No (2)  

shakti prakash mishra  (11 years ago)

send the paper to shaktimishra138@gmail.com
u will get solution in 2 days

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Anurag Srivastava  (11 years ago)

Hey AKANKSHA SRIVASTAVA , would u pls send me the elitmus paper...on anurag.srivastava 2408@gmail.com !!

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Ankit Saun  (11 years ago)

hey akanssha send me the question i will tupe and submit.My id ankitsaun.thekiller@gmail.com

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CRASH  (10 years ago)

I don't get it.
Perimeter of Circle depends on radius i.e length of rectangle.
Perimeter of Rectangle depends on length and width of rectangle.
So, if we change width of Rectangle keeping it length constant, it should change perimeter of rectangle keeping perimeter of Circle still the same.
So, m ie ratio of perimeter of rectangle to that of circle must depend on width.
So, i would say ratio can't be determined.

Is this solution Helpfull? Yes | No (2)  

pooja kumari  (7 years ago)

from question, diameter(d)=length(l)
radius=l/2;
l*b=pi*(l/2)2;
b=pi+l/4;
now, 2(l+b)=m*2*pi*l/2
2(l+pi*l/4)=m*2*pi*l/2
after solving, we get
m=1/2 +2/pi

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