"We cannot solve our problems with the same thinking we used when we created them."
- Albert Einstein
3.
The ratio between the perimeter and the breadth of a rectangle is 5 : 1. If the area of the rectangle is 216 sq. cm, what is the length of the rectangle?
Area = 3x/2*x = 216=> I got the value for x is 12 which is the length.
Is it correct ah?
Sankar said:
(Sat, Feb 19, 2011 07:45:53 AM)
No its wrong. Value is given in ratio.
Shahid said:
(Thu, May 19, 2011 04:57:41 AM)
@Bharathi ..your answer is absolutely right.
There is no error in it.
Muthulakshmi said:
(Thu, Sep 8, 2011 06:54:02 PM)
@Bharathi
your ans is correct .12 is not the length it is the value of breath.
see your explanation.
perimeter=2(l+b)
ratio b/w perimeter and breathis 5:1
5x=2(l+x)=2l+2x=>"l=3x/2",
area =3x*x/2=21=>x=12 which is not the value of length
substitute the value of "x" in the equation L=3x/2=(3*12)/2=18
2l + 2b = 5b