Srinivas murthy

• Aug 4th, 2005

 

Total cost = 3600 
cost per sq meter = 60 
Area of rectangle = 3600/60 = 60 sq meter 
 
Let  
length = L 
Bredth = B 
 
Area of rectangle = 2*(lenght * bredth) 
 
Area = 2(B * 2B) = 60 
6B = 60 
B=60/6 
B=10 
 
L=2B 
L=20

veeru

• Aug 4th, 2005

 

The solution to the question is wrong

Shanker

• Aug 4th, 2005

 

Hello Veeru, Why don't you post the answer and explanation why it's wrong insted of just saying wrong.  
 
Thanks,Shanker

Rakesh verma

• Aug 27th, 2005

 

solution provided above is wrong b'coz AREA of a rectangle is not 2*(lenght * bredth)  
 
but is (Length * Bredth) 
 
ya perimeter of rectangle is truly 
2*(length + bredth) 
 
now have a look at question again 
.... cost of grounding is 60 rupees per meter.... 
 
now it is clear that cost given to us is in "meter" and not in " meter square" 
so tell me why we will calculate AREA. 
 
it is obvious that we have to use its perimeter 
so now solution will look like this 
 
Total cost = 3600  
cost per sq meter = 60  
Area of rectangle = 3600/60 = 60 sq meter  
 
Let  
length = L  
Bredth = B  
 
given that L=2B 
 
Perimeter of rectangle = 2*(lenght + bredth)  
 
Area = 2(2B + B) = 60  
6B = 60  
B=60/6  
B=10  
 
L=2B  
L=20