The sides of a rectangle are in the ratio of 6:5 and its area is 1331 sq. m. Find the perimeter of the rectangle.
Let 6x and 5x be the sides of the rectangle.
So, 6x*5x= 1331
Length= 6x= 6*11=66
Breadth= 5x= 5*11=55
Perimeter= 2(l+b)= 2(66+55)= 121m Ans.
Area of rectangle= length*breadth
Perimeter of rectangle= 2*(length+breadth)
If the sides are in the ratio, then take it with respect to x and find x, then find length and breadth by equating to the formula of the area. Once, length and breadth are obtained, we can find the perimeter by using the formula.