Question 145537
Let the length of the wide side be = b
So, the long side will be = l = 4b
For fencing we generally calculate the perimeter of the area to be fenced which is given by the formula : 2 (l + b) where l stands for length and b for breadth.  This basically means we have 2 lengths to cover and 2 breadths to cover with our fence.  But, in this problem one length is covered by a river so our formula is reduced to : 
l + 2b
which we know is 1002. So our equation would be 
4b + 2b = 1002
6b = 1002
b = 1002/6
b = 167
l = 4b = 4 X 167 = 668

Ans. : The length of the region is 668m while the breadth is 167m.

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