the length of a rectangle is three times its width and the length of its diagonal is 6 root 10 cm. the perimeter of the rectangle is?
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let the breadth , b = x cm
therefore length , l =3x cm
ATQ,
√(3x^2 + x^2)=6√10
sq. both sides
4x^2=3600
x^2=900
x=30cm
therefore
perimeter= 2X(30+34)
= 128cm
therefore length , l =3x cm
ATQ,
√(3x^2 + x^2)=6√10
sq. both sides
4x^2=3600
x^2=900
x=30cm
therefore
perimeter= 2X(30+34)
= 128cm
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