The perimeter of a rectangle is 40m. Its length is 4 times less than five times its breadth. Find its area.
Answers
Answered by
1
Hi Mate!!!
Perimeter of rectangle having Length L and breadth b is = 2 ( L + b )
According to the question
L = 5b -4
40 = 2 ( L + b )
40 = 2 ( b + 5b -4 )
b = 4 cm
and
L = 16 cm
Have a nice time.
Perimeter of rectangle having Length L and breadth b is = 2 ( L + b )
According to the question
L = 5b -4
40 = 2 ( L + b )
40 = 2 ( b + 5b -4 )
b = 4 cm
and
L = 16 cm
Have a nice time.
nithin441:
you check first
L = 16 and b = 4 itz perimeter is 2 ( 16 + 4 ) = 2 ( 20 ) = 40 cm which is same as written in given equation
breadth is b
Not 5b-4
dear check ur Ans ones more u have done a calculation error
where
i post a cmmt on ur ans just see it
have you got it.
thanks bro
welcome.
Answered by
1
breadth=x
length=5x-4
perimeter=2(l+b)
=2(5x-4+x)
perimeter=40cm
2(5x-4+x)=40
6x-4=20
6x=20+4
6x=24
x=4
breadth=4
length=5×4-4
=16
area=l×b
=4×16
=64
length=5x-4
perimeter=2(l+b)
=2(5x-4+x)
perimeter=40cm
2(5x-4+x)=40
6x-4=20
6x=20+4
6x=24
x=4
breadth=4
length=5×4-4
=16
area=l×b
=4×16
=64
6x -4 = 20 => 6x = 20 +4 but not 6x = 24 -4 wrong as u done
Similar questions