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Monday, December 24, 2018

A man is walking in a rectangular field whose perimeter is 6 km. If the area of rectangular field be 2 sq km, then what is the difference between the length and breadth of the rectangle?

A man is walking in a rectangular field whose perimeter is 6 km. If the area of rectangular field be 2 sq km, then what is the difference between the length and breadth of the rectangle?
A½km
B1 km
C1½km
D2 km

Answer is : 1Km
Let the length and breadth of the rectangular field be a and b km. respectively. 
Then, 2(a+b)=6 
a+b=3(i)
and 
ab=2(ii)
Now, 
(ab)2=(a+b)24ab

(ab)2=3242

(ab)2=98
(ab)2=1

(ab)=1

Sachin Khr
answered Nov 18 '2016 at 20:41

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