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Mega12357go
Answered

the length of a rectangular frame is 4cm more than the width.the are of the frame is 60square cm .find its width and length​

Sagot :

Math3493go

A = l × w

60 = (4 + x)(x)

60 = 4x + x²

0 = x² + 4x - 60

0 = ( x + 10 )( x - 6 )

x = -10, x = 6

x = 6

length = 4 + 6 = 10

width = 6

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