The length of rectangle is twice its breadth and the length of the diagonal is 6 under root19 cm find the perimeter of rectangle.
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let breadth is x
then length is 2x
then length of diagonal is =x²+(2x)²
=5x²
=√5x
then
√5x=6√19
or x=6√(19/5)
or x=6/5√85
then perimeter is
2(x+2x)
=6x
=6*(6/5√85)
=36/5√85..........(ans)
then length is 2x
then length of diagonal is =x²+(2x)²
=5x²
=√5x
then
√5x=6√19
or x=6√(19/5)
or x=6/5√85
then perimeter is
2(x+2x)
=6x
=6*(6/5√85)
=36/5√85..........(ans)
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